Captured Rook from the very beggining

What are the things to be considered in planning an attack on the Black King that has castled and that has lost it's Rook. I decided to start a game in which i've given up 1 Bishop and 1 knight in exchange for my opponents defending Rook. My goal is to concentrate my attack on the king from the very beggining. I thought maybe if i can take it's Rook early that would give me an edge, now the king stands alone with only 3 pawns  in front of it to defend ( with no Rook by it's side).  What are my options and what should i consider for the best and most effective attack

Thanks and forgive my ignorance for this is my very first time that i'm posting.

Even though i'm in a game with this situacion the question actually is in general.

I was always wondering as to how should i aproach such a scenario.

I can see that your game is now finished so the issue can be discussed. Unfortunately your opponent ran out of time so you didn't get the chance to play it out. Here is the game:

http://www.chess.com/echess/game.html?id=40200291

Anyway, you said in your first post:

I decided to start a game in which i've given up 1 Bishop and 1 knight in exchange for my opponents defending Rook. My goal is to concentrate my attack on the king from the very beggining. I thought maybe if i can take it's Rook early that would give me an edge, now the king stands alone with only 3 pawns  in front of it to defend ( with no Rook by it's side).

First thing, generally speaking: You are exchanging 2 attacking pieces for 1 defending piece. That doesn't sound like a good idea unless the position calls for exactly that in which case it is a sacrifice that gives you something in return. Thus if your goal is to attack early in the game you need pieces that can attack instead of exchanging them for a rook. If you have a lot of pieces developped and the opponent only have a rook ready to defend on that side of the board, well then you have something to work with. But that is only the case early in the game if your opponent played very badly in the opening.

Second thing, generally speaking: The light pieces, bishop and knight, are strong in the start of the game, there are usually diagonals for the bishops and places to go for the knights. The heavy pieces, that are the rooks (since the queens are irrelevant in this discussion), can't do much at this point of the game, they need lines and files to work on which will take some time to establish and that doesn't fit your idea of an early attack. Thus the guy who is forced to give up a rook in exchange for a bishop and a knight would be the lucky guy.

Third thing, that paticular game you just played:

After 7.Rxf2 Bxf2+ 8.Kxf2 d6 black has one piece developped while white has 3 pieces developped. So black has nothing set up to make an early attack.

In the following moves white uses a lot of moves to move around with his queen, he doesn't get further developped for a while. Then black attacked white's queen with his knight but the knight got kicked back afterwards. But no early attack towards white's king is going on despite the fact that white didn't make much progress for several moves. But black could't take advantage of that for the simple reason that his pieces weren't yet set up ready to attack.

The last move:
15.Nd5 Qh6

Finally white is more active, his knight is now nicely centered on d5. Black's queen is on h6, probably set up for the reason of attacking white's king.

Now white has the move, if I were white I would consider playing 16. d4, counter attacking in the center when the opponent is attacking on the wing. Note that after 16. d4 black's queen is under attack, so black has to focus on saving his queen while white is active in the center.

White certainly has the initiative in that position.

So that is my 2 cents.

Thanks