How do I show my pictures on my LG TV

Do you mean through your iPhone?

The easiest way, would be to buy an AppleTV 2.

Best way is to buy the $99 US Apple TV 2.

If you do not have an Apple TV, you would need cables to connect your iPhone to the television. Check the Apple Store for something like this:

http://store.apple.com/us/product/MC748ZM/A?fnode=MTY1NDAzOQ