In any case, in the "Beginners and Audiophytes" forum there's a thread entitled just for these situations titled "Need basic advice? Check here first"
Apparantly you missed this. Here's your chance to correct that oversight.
http://forums.audioholics.com/forums/showthread.php?t=2203
Likewise, there's a whole "AV University" section available from the main page of this site.
You might want to avail yourself of these first and then ask more specific questions.
In any case, you might want to become familiar with your owner's manuals. These can be the source of untold knowledge. Not everyone is familiar with all equipment and the onus just may fall back on your reading these.
Likewise, PS3 , Xbox, cables and video/sound cards have been discussed frequently. You might want to become familiar with the "search" function to dig up some threads on these.
Actually, there's a separate "cables and interconnects" forum. Did you read any of the posts there?