can anyone give me a quick note on the ammount of points you win or lose when a game has ended and how it works, thanks 

It's a complex calculation ... http://www.chess.com/article/view/chess-ratings---how-they-work

The number of points by which your rating will change is different for you and for your opponent. It also changes during the game, as your - or your opponent's rating changes. The only useful information you can find out is: how much your rating will change for a win, a loss and a draw at THIS POINT in THIS GAME. Use show rating adjustment, under the Details tab, for something like this:

Rated - Win: +16  Loss: -9  Draw: +4

Thank you

Also, when you receive a challenge, you are shown the consequences before you accept. e.g.

As noted before, these consequences (in terms of points) change dynamically throughout the game.

Looking at your Games Archive,

Recent Games

 you had a rating of 1203. Your draw netted you 2 rating points. The loss lost you 7. The win against a similarly-rated opponent gained you 13 points; but the win against a significantly weaker opponent only gave you 4 points.

The main factors affecting the number of points for a win/loss/draw are: the relative strengths of the two players and the number of games each has played.