Yes
They do have a touch screen, but they don't do apps.
You can play games on 1-5th generation ipod nanos, but you can't play games on a 6th generation.
no the first is thicker and wider
Yes it is. Thus the name iPod TOUCH
yes the only ipod that doesnt have a screen is an ipod shuffle i have the ipod nano 4th generation i luh-v it itz ah-mazing
Yes. iPod touch 3rd generation is just a 2nd generation iPod touch that's faster and includes support for newer operating systems.
2005
NO
iPod nano's are like iPod nano's
Yes
Yes
You can buy an adapter from Apple that allows you to connect iPod touch to an external screen such as an HDTV. If I remember correctly, you have to have a second-generation or later iPod touch.