Q: Activate iPod 5 Problem

You need to reset the the account password

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.

If necessary contact iTunes:

Apple - Support - iTunes - Contact Us

Contact iTunes support. If they can't help you, then you're hosed. The last resort would be to take the device along with the original proof of purchase to Apple and ask them to remove the activation lock. If you can not prove original ownership of the device, then it's a brick. Permanently.

Forgotten Security Questions/Answers

You need to contact Apple by:

1 - Use the Express lane and start here:

https://expresslane.apple.com

then click More Products and Services>Apple ID>Other Apple ID Topics>Forgotten Apple ID security questions.

or

Apple - Support -form iTunes Store - Contact Us

2 - Call Apple in your country by getting the number from here:
http://support.apple.com/kb/HE57

or          

Apple ID: Contacting Apple for help with Apple ID account security

3 - Use your rescue email address if you set one up

Rescue email address and how to reset Apple ID security questions

For general  information see:

Apple ID: All about Apple ID security questions