Well, chances are you can't in less you contact the Apple company yourself and ask them if they will unlock it (chances are they will if not reported stolen). Or you can contact the person that sold it to you and ask them for the password.
Unlock it
slide 2 unlock
eBay
eBay
ebay
Go restore your iPod Touch
Ummm Slide to unlock ? >>>>>>>
touch it and drag it sideways on the ipod screen
u hook it up to the computer and donload the latest verision of itunes then when its all done when u go in ur ipod touch file it should say restore click on thet and it will restore ur ipod touch to just the way u bought it hope that helped
restoring to factory condition that's the way to unlock any iPod
In shops Ipod Touch cases are pretty expensive for what they are.So try eBay or amazon.I got my case of eBay for £2. And eBay have a wide selection.
EBAY