Q: reset ipod 5 without orignal id

You need the recover the ID and password

Is there a way to find my Apple ID Name if I can't remember it?

Yes. Visit My Apple ID and click Find your Apple ID. See Finding your Apple ID if you'd like more information.

How do I change or recover a forgotten Apple ID Password?

If you've forgotten your Apple ID Password or want to change it, go to My Apple ID and follow the instructions. See Changing your Apple ID password if you'd like more information.

However, if you are the original pruchaser and have original receipt Apple will help

http://www.apple.com/support/itunes/contact/