for stereo, you have 2 choices
1) if you have a digital out on your sound card and a digital in on your stereo receiever, you can utilize a digital connection between them for great sound. let me know if you have either, and i can give you further instructions on hooking up using a coaxial digital connection
2) assuming you don't have a digital out on your soundcard or don't have a digital in on your receiver, you can simply use the regular speaker out of the soundcard and get a 1/8 inch stereo male to dual RCA adapter from radio shack, and then run a normal run-of-the-mill RCA cable from that adapter to any available "auxiliary" input on your receiver. select that input from the tuner menu, and away you go
as far as video on your tv, you would need a video card with a TV out. i'm not the expert on the video side of things, so i'll leave "what's the best card with a tv out" to others to answer
