If you have the aluminum body MacBook Pro you will need a mini-DVI to DVI adapter ($19) as well as a DVI to HDMI cable (prices vary, check monoprice.com). After that, pick yourself up an optical toslink cable to get the audio from your MBP.
If you have the new unibody MacBook Pro, you will need a mini-DisplayPort to DVI adapter ($19) and the same DVI to HDMI cable. Same audio cable as above.
After you find the right cables, I suggest picking up an Apple Remote if you do not already have one. It'll let you play around with FrontRow and all that using the IR port on the front of your MBP.