A touch screen is both input and output. The touch sensor is input, the display screen is output.
settings- general - password lock
Take off the sticker.
yes, but you will have to download some DVD ripping software to your computer.
Upgrade to iOS 4. It's free. It won't work if you have an old iPod Touch (before September 2009) or any 8GB iPod Touch. You'll need to jailbreak to get wallpaper.