Quick questions/downloading/recs.

Hey all. I am new to PC gaming. I wnted to know where i could find some freePC games. Maybe any old converted xbox games or psone/two games i could download.if nyone knows any cool sites i could go to or could send me some files that'd be awesome. Also what are some good PCgames you might recommend because ill be doing some serious shopping come payday. hahaha!