Geez. okay lets see if I can help you.

This is what you already know. First you need a bittorent client. you can get it here. I use ABC but choose the one thats comfortable to you.

Once you download it you can now obviously download bittorent files.

Once you click a torrent file it will automatically open in your bittorent client but if it doesnt follow the instruction below.

When you click on the torrent file you click open and it opens in the media player or it just plain doesn't open in your bittorent client. Well if that is whats going on then click the torrent file and instead of clicking open, you click save and save it in a folder of your choice. Once you save it go to the torrent file you saved and right click it. Go where it says OPEN WITH and choose your bittorent client. That will open the torrent file on the bittorent client. Save it on a folder of your choice again and once you press okay the download will start.

About players and codecs. I suggest you download the divx codec and the AC3 filter codec. If you still have problems with audio or video download the latest FFdshow codec. For player, check if you can do it with your windows media player. If not then download one from the forum topic link that they gave you.

Thats about it. Good luck.