Yup.
no u can get it off itunes appstore
No
Yes I recently jailbroke my iPod 2nd gen and all the apps I got off iTunes or the AppStore didn't get deleted
on itunes it does
The App Store is already included on the iPod Touch.
No it is a second appstore but different
It depends on what you're adding it from.
No, downloading iTunes on your iPod is completely free. However, the songs, videos, and other things that you download from iTunes are not free.
Try installous or cydia, not on appstore
Yes. You have to set up a payment option on Itunes(credit card)
yes! there is an app that is on your touch called itunes.