My iPod is disabled, how can I recover?
If you enter your password wrong too often, you either have to wait the time shown on the screen or erase the device with iTunes (or through iCloud, but that probably doesn't apply for you). The exact procedure depends on whether you synced your iPod with your PC before. Apple has a support document explaining the required steps in detail.

PS: If you haven't used iTunes before, you will have to install it on your PC first.