4 gen. Because 4 gen has a camera, facetime, and a higher IOS level.
No it did not. It had IOS 6. But you can get IOS 7 on it. Also when IOS 7 came out they put it on the iPod 5 in stores.
When you update your iPod 4gen it should not screw up your iPod. You apps will still be there.
No, only iPod Touch 5 can use iOs 7
ios 7 is coming for ipod 4g on september 27th! (today!! :) )
The only iPod that can run iOS 7 is the 5th generation iPod Touch.
NO
There is no way to undo iOS 7 after restoring your iPod because iOS 7 is not released yet. However, to downgrade the iOS of your iPod simply download the firmware of the iOS you want from the Internet. While in iTunes, hold shift as you click "Restore my iPod to factory settings" and choose the file you just downloaded and your iPod should be on a lower iOS.
iOS 7 isn't available on 4th gen iPod Touch
No
Sadly, no. The latest version of iOS for the 4th Generation iPod Touch is iOS 6.1.5.
get a 4gen that have built-in camera