It does not, unless the update is interrupted or, you restore instead of update.
To erase pics from an iPod touch all you have to do I'd erase them from the directory on the computer from which you uploaded them to your iPod and they will be erased from the iPod at next sync.
yes you can erase stuff on wikipedia
no its not actually its recommended
Resetting the iPod will erase all of the songs, so remember to back it up!
It will.
Yes, updating the software of an iPod undoes the Jailbreak.
restore it on itunes
To erase an app on an ipod touch you put your finger on it and hold it down until they all start to move. Then you click on the x in the corner of the app you would like to erase. If you would like to erase a song you can not do that from the ipod. You need to go onto the computer you have it synced on and un-check it from your library.
nope
Yes, resetting the iPod completely (restoring) will erase the notepad info. Resetting as in turning it off and on will not erase it.
No.
Yeah it does .