Currently Being ModeratedJul 24, 2013 2:39 PM (in response to Naomi8)
You can try the steps in this tutorial: http://www.apple.com/support/ipod/five_rs/classic/
But if you are hearing clicking, it may be an issue with the hard drive in the iPod, and you would need to get it serviced. You could take it into a Genius Bar just to be sure.
I'm not sure how much you paid for the iPod on ebay and if you want to pay to have it repaired, but you can find Apple's repair options here: http://support.apple.com/kb/index?page=servicefaq&geo=United_States&product=ipod
I hope that helps!