you probably have liability to sue apple for false information on the app store, if not should get a refund of what you got charged. Jailbreak your iphone/ipod much better you can get any app free weather it costs money or not its simple youtube has tutorials how to aswel!
Yes they are, and a lot of "Free Games" are actually demo's, or the first couple of levels and after playing there will be a prompt asking you to buy, more, play again, etc.