Cant figure out how to use mp4 player,no manual.help?

This isn't the best manual I've ever seen, but here it is: http://http.vitalstreamcdn.com/cobyelectronics_vitalstream_com/manuals/MPC848_MN.pdf
You can also use Windows Media Player to transfer your songs onto the player. It is not compatible with iTunes, but you can use the Rip tab in Windows Media Player to rip songs from a CD - you have to go into the Rip Options and change the Rip format to Mp3 first. Coby does have a video on the process at:
http://www.cobyusa.com/?p=tutorial

You can also load mp3 files from a music service such as Limewire into your computer's "My Music" folder - Windows Media Player should automatically detect the songs, but it may take a few minutes.

Good luck!

-Tha Mp3 Doctor