Twinkle and Tap Tap Profile change?

I just recently was given an iPod Touch from a friend. I went to change the profile when I downloaded Twinkle but it had his tap tap profile already. I wnet to chaneg it it brought me to some site on my device and then I went bac into twinkle and it let me put me own email and username in, but it gives me an error saying cant save avatar or username taken add new device, so I do that it sends me an email I click the link it says successful, yet nothing. It asks me to enter me info again. Help?