Yes and no. If you sync it your iPod will remain jailbroken. If you update it to say 4.1 it will un-jailbreak your iPod. Then you will need to re-jailbreak it.
Easy and simple. You have itunes and then connect to computer. Open itunes and select your ipod. Near the bottom right corner there should be a button sync. Sync it, When syncing make sure you don't skip the backup step. Then click update ipod. It will take a while and then it would usually say open from backup. Select yes or ok. After this sync ipod again the same way and walah done!!!
No. If you sync your iPod it wont delete your apps. But if you click "Restore" while the iPod is plugged in, then it will restore you iPod to how it was when you bought it (no apps, no contacts, etc.) and then update it to the newest version of software.
click update in iTunes. Side bar in right > Your ipod "whatever you named it > Summary > Update. It should pop up asking you to download and update in a dialogue box when you sync your ipod with your computer.
yes if you have the playlist in itunes drag it onto your ipod.
Yes, first sync your ipod though. Don't update to 4.3.4 or 4.3.5 yet as those have no untethered jailbreak.
songs might not be seen on an ipod, but in itunes if you did not sync them to the ipod. or if you synced it and still no songs, you might need to update your version of itunes
If you want to sync only certain songs: 1. Open Itunes 2. Plug in your Ipod 3. Go to "the name of your Ipod" tab 4. Uncheck "Automatically update music" 5. Drag music from your library to your Ipod tab. If you want all of your library music on your ipod 1. Repeat steps 1-3 2. Check "Automatically update music" 3. Click "sync"
delete them from your itunes libaray then update your ipod.
No it's free. go to iTunes and click Update when your iPod Touch is connected to the computer. *Make sure you sync it before you update.* If you don't, you will probably lose all the data on your iPod. I don't know about iPhones though...
If all of your songs are still on itunes then yes.
Update to most recent version of itunes.