No, the glass on an iPod Touch isn't just a protector. The glass is the touch screen, and without it, you don't have anything to touch, rendering the iPod Touch useless.
No
Get a case and a screen protector
There are currently four types of iPods with a touch screen: the iPod Touch, the iPhone, the iPad, and the ipod nano multi-touch.
No. If you want a screen protector or case you have to buy one. The ipod comes with headphones and an instruction manual. If you're looking for a case or screen protector I suggest looking at Five Blelow.
No, there is presently not an app for the ipod touch to weigh things on its screen.
I had my iPod Touch screen protector on for about a year and 2 months with heavy usage (brought to school and on bus). The protector even got some scratches on it. If it wasn't for the protector, my iPod would've been scratched up. It would be recommended to put a protector on the back of your iPod as well...
No, you cannot. iPod touch apps will only work with an iPod Touch or iPhone - no other touch screen mp3 player.
An Ipod touch is an Ipod with a touch screen and lots of apps. The Iphone also has a touch screen and lots of apps, but is slightly thicker and is a mobile phone and can make and receive calls texts, etc. Basically, the Ipod touch is an Iphone without the phone bit.
No there is not, you have to buy one separately.
The creation of the iPhone led to the development of the iPod Touch. The iPod Touch was meant to be a non-phone alternative for a touch screen iPod, and just a next line of iPod.
It's up to you to choose, it's better to get a screen protector since scratches would mess up the touch screen and make it harder to use, but you dont have to get 1, just better to do.