Hello, and thank you for using this service.
Sorry to hear you are having trouble.
I am an experienced and educated IT professional, and will see what I can do to help.
Do you use icloud, and if so, do you also use it on this particular ipod device?
Hold the Sleep/Wake and Home buttons together until you see the Apple Logo. Then if you still get that message Go here and find your Apple ID and password: https://support.apple.com/en-us/HT201487