If your laptop has an S-Video out then you can use that. If your TV has S-Video in, then you can use an S-Video cable (go figure). If it doesn't, then you will need an S-Video to RCA (composite) adapter and an RCA cable.
Yep, and if you want the sound to come out of the TV speakers then you will need an 1/8" to RCA cable as well (although it depends on your setup, it may not work if you are using an S-Video cable).
yes, you should be able to, you can get a 1/8" stereo to rca cable from walmart or such, it will look like this: http://www.macfriends.com/productImages/audio/13927.jpg
just plug that from your headphone out or your lineout.