You will lose every thing that is on it
To 'unjailbreak' an iPod Touch, you have to do a system restore, which is available in the iPod Touch home menu in iTunes. This will erase all content that is on the iPod Touch, including bookmarks in Safari and contacts in the Contacts.
Yes
Yes you can use WhatsApp on an iPod Touch. However there are some limitations to using it on the iPod Touch as opposed to the iPhone. You will require a functioning mobile phone number during the registration process. This number would be used to send and receive WhatsApp messages to and from your contacts. When your iPod is on sleep mode (the screen is inactive/off) and unplugged from your computer it stops receiving a wi-fi signal. During this time you will not be able to receive WhatsApp messages unless your iPod is connected to your computer via USB. And finally, your contacts and their mobile numbers must already be in your Contacts on your iPod.
I don't think you can. You can synch your iPod manually with your new computer tho and select all the tracks on your iTunes that you want to download and then it will add them to your iPod without deleting the tracks on your iPod first. Your other option is to copy all your tracks from your old computer to your new computer then automatically synch your iPod, then it wouldn't matter if i wipes it. I have manually synched my iPod on different macs and it works fine.
Yes, you can connect an iPod Touch to a computer. Every iPod Touch comes with a cable, and that cable plugs into the bottom of the iPod Touch and the USB 2.0 port in your computer.
For the iPod Touch 4: If the ipod touch's owner has the iphone owner's number, they can add it to 'contacts' and press 'facetime' and it should work. If the iphone owner has the ipod touch owner's email address, they can add it into 'contacts' and press 'facetime' and it should work.
you need a ipod touch, and the ipod touch chharger then you have to plug it into the computer
It will delete music from iPod Touch, but the regular iPod i don't know about.
iTunes from you're computer or if it's an iPod Touch from the iPod Touch
Use the cable that came with the iPod Touch to connect it to the computer, and the iPod must be on for it to charge.
To have the iPod Touch show up on your computer, just plug in the iPod Touch while it is on. The computer should automatically recognize the iPod Touch whether it is a PC or not. If it does not automatically recognize the iPod Touch, then just open iTunes (version 8.0 or later).