HI,
Options available:
1. A mini-display port to HDMI adapter has been announced :
http://i.gizmodo.com/5150484/mini-displayport-to-hdmi-adapter-coming-soon-for-14 You could get this and an HDMI Cable and your set.
2. If you need something now you can get a Mini Display to DVI adapter :
http://store.apple.com/us/product/MB570Z/A?fnode=MTY1NDA3Ng&mco=MjE0ODQ0Mg In this case, you will need that adapter, a DVI cable, a DVI to HDMI (with the right female/male connectors) and then an HDMI cable.
3. Use your TVs pc port, which is essentially SVGA. You will need a Mini-Display to VGA Adapter
http://store.apple.com/us/product/MB572Z/A?fnode=MTY1NDA3Ng&mco=MjE0ODQ2NQ and the appropriate VGA Cable. However, you won't get the maximum resolution that you Macbook's graphics card can display. This may be important to you.
However, all these choices are video only. You will need to run an RCA cable/Optical cable from the headphone jack on your Macbook to your Television or your Audio System to get sound to come from your television.
Also, to adjust display settings, go to "Displays" in the system preferences.
All the equipment can be found using the links provided or at monoprice.com
Hope this helps