Ruy Lopez (spanish)(you have to learn sicilian as well due to if they play c5 instead of e5) ,Queens gambit, one of those as white.

Sicilian or one of the strong queen gambit lines as black.

Kings indian defense suits me better then the queen gambit declined

I would say Scotch Game as white, then as black learn the sicilian against e4 and the slav defence against d4. Hopefully you will be able to use these openings in the majority of your games.

as both white or black

e4 e5 ruy lopez/scotch

d4 d5 slav or QGD

and silician as white too

3 openings?

Consider what happens if you play 1. e4

you will notice how many different things that black can play after just one move.  So go over the games explorer and ask on the boards about a specific opening that interests you.  Some questions to ask are what are typical maneuvers, exchanges, pawn breaks etc. 

I must say that you don't really need opening prep at this time(If getting good at the game is your goal.  Although, going over the openings and LEARNING(not just memorizing moves but learning the ideas and principles behind them) about them will definitely improve your game).  Most of your focus should be on the basic opening principles, tactics, basic endgames(mate with rook, king vs. king and pawn endings), not hanging pieces and basic strategy(putting rooks on open files, knights on outposts etc.)

Don't try to learn 3 openings. Pick a defense against each of white's main first moves (e4, d4, c4, maybe Nf3 but that often transposes) and learn the lines that you are going to play and only those lines. Learning something like the whole Ruy Lopez is way too much work, just pick something that you would like to play and start there. Black openings should be learned first because it's easier to get in trouble with black, atleast thats what I find when I don't know the lines.

Yeah - its probably better to learn by PRINCIPLE, what white's best first moves are and UNDERSTAND WHY. Then look at what black's best first moves are in response (again at each phase analyze why - this exercize will take a while.)

After you have looked at these options, make a second move for white and look at every option and try to decide whether or not it is a wise second move. At each step look at what black's possible responses are and if it puts white in  a better or worse position.

You can do this for the first three or four first moves of the game for both sides and see what positions you want to arrive at as white or black. If you like a particular tactic(like attacking kingside/queenside, etc) and figure out a good tactic to do that STUDY IT! Learn how to arrive at that result even if your opponent plays an oddball move or tries to thwart it.

Here is one more suggestion too - When analyzing remember these three principles of the opening:

Does this move develop my pieces(does it get them into fighting/controlling positions on the board) and get them ACTIVATED rather than in confined passive positions?

Does this move gain more control over the center?

Does this move facilitate the protection of my king? (ie, does it leave my king in an exposed place or does it leave adequate protection / allow my king to be closer to castling?

Depends on how you like to play as well. If you like the rough stuff you'll be looking in the 1.e4 department.

Quieter things can be found with 1.d4.

1.c4 is usually quiet, but sometimes games will become more sharp than any 1.e4 opening.

There are bunches of others.

Then with black, you'll need answers to 1.e4 and 1.d4 which you can also pick based on howyou're playing.

Are you new to chess? If so there are many openings that you don't want to try yet.

Anyway, here's a start. Remember to take whatever you read with a grain of salt. Even GMs make mistakes with this kind of stuff.

http://en.wikipedia.org/wiki/Chess_opening

There are very few openings that you can force. Play 1. e4 and you have lots to prepare for unless you do a King's Indian Attack setup.

I suggest 1. Nf3 with White. You can focus on Reti, but practice some of the other related openings that might result.

For novices the following have been recommended to me:

White: Four Knights' Game, Scotch Game, Giuoco Piano

Black: Two Knights' Defense, Caro-Kann Defense, Queen's Gambit Declined

I started by playing Bird's Opening which got me into a bad habit of trying to play f4 in any position, so start off with something mainstream like 1.e4. If you dont want to learn too many lines then start with 1.nf3 which limits black options rather significantly. Good luck.

 that should have actually said mate with king, rook vs king AND basic king and pawn endings.  This is what happens when I rush things.

learn ONE by ONE..  the CHESS WORLD is vast..

Depends on your style of play.  Are you an agressive  or positional player?

White - Agressive:

Kings Gambit

Evans Gambit

For newer players, I highly recommend learning the Ruy Lopez and the Queen's Gambit Declined from both sides.

These are the most logical openings in chess (or at least the easiest of which to explain the logic).  Get at least a rudimentary understanding of what they are about before you go looking at more exotic lines.

 Forget about style at your level.  At your level you are(no offense but everyone starts somewhere) not very good at anything.  Once you start getting good at attacking then it also doesn't mean that is your style.  It means you need to work on your defense.  Once you get good at these things and much more then you can worry about style

Also, I would say that the Queen's Gambit is generally considered much less 'aggressive' than the Italian game (unless you're referring to the Giuoco Pianissimo).

Playing 1.e6 vs. anything is an option. A lot of times it can lead to a French Defense regardless of White's opening move. But you must be prepared for White taking a non-French approach.

learn one for white, one against e4 and one against (at least mostly) everything else ;)