Found my old iPod...help?

Okay, so for I’m leaving for Guatemala soon and I don’t want to bring my iPhone with me because it might get stolen. I found my old iTouch from like 2011 and I had a passcode on it but I have no idea what it was.

I’ve changed it multiple times and now it’s licked for 5 minutes…how do I unlock it through iTunes? I don’t mind erasing everything on it, I just need to get it unlocked.