No.
No.
no, updating your ipod will update games and bugs on your ipod but leave music
yes
all your stuff will get deleted.
You must drag it back onto the iPod via iTunes when your iPod is plugged into the computer.
Why does iTunes lose your music library?If you have put any new music on your iPod lately, your computer could have synced your iPod and deleted all of the music.
If you jailbroke it by using cydia all the apps and cydia apps will get deleted
It depends. Do you use iTunes with your iPod? If yes, then why not just sync it again and get all your songs back? But if you mean your iPod actually went on your computer and deleted all your music, which i don't think happens very often, then your going to have to download all your music again!
Technically yes because it will remove your jailbreak if you update and any cydia apps, such as installous will be deleted.
No, your music on your computer will be safe. However, bscause iTunes only allows an iPod to be synced with one music library at a time, the music won't be able to be synced to another computer.
Go into your music library in itunes and right-click on the music you want to delete. The window that pops up should have a delete option, click on it and the music will be deleted from your library and the next time you sync your ipod, the music will be deleted from there too. (I'm not sure what other versions of itunes this works with, but i know it works with itunes 10.)
You simply change the settings of your iPod to "Manual". iPod default settings are set to "Sync", which causes music to be deleted automatically from your iPod when connected to a different computer. Plug your iPod into a computer. Under the "Devices" section, you will see the settings of your iPod. Click on "Music" and change the setting to Manual.