I don't know where to start....just bought a mp4 player

please help me out here.....I bought a digital mp4 player, and yes it was from ebay, but also from Hong kong.I have no idea on where to start. I charged up the battery and that’s it. Please help me, I have windows xp. then now, I"m downloading Itunes...that is it, what else would I need to know????? thanks, sincerely Lost Sondra from wisconsin . please email me at sondy46@yahoo.com thanks,