Q: Old iPod touch

Hi

I am presuming the password it is asking for is iCloud if so this may help?

If you're asked for the password to your previous Apple ID in iCloud - Apple Support

Are you able to restore the iPod within itunes? Then you can start from scratch with new email and re-sync?

The functionality of the email account is in no way related to the functionality of iTunes or the Apple Id its associated with.

Unless the Photos on the iPod were taken with it, or created on it, and not synced form a computer, they cannot be directly transferred out.

As for Music, syncing is generally on way. From iTunes on a computer to the device, and you cannot transfer it out of the iPod directly.

If the Music on the iPod was  purchased from the iTunes Store, you may be able to transfer those purchases onto iTunes on a computer.

Re-download or transfer your iTunes Store purchases from an iPhone, iPad or iPod to a computer - Apple Support

For everything else you will need a third party App such as iExplorer to get it out of the iPod.

Also I would suggest updating the email address of the Apple ID here:

http://appleid.apple.com