Using an Ipod 30Gb

I inherited an old ipod 30gb. I can listen to the music what is on it but I can't delete or upload anything. It's read only.
How can I change that?

I probably would like to format it or at least delete the files on it and load my own MP3 files and pictures.
What program can I use?
Or can I keep the apple programs that make the thing work as an ipod?
Is this an option with Ubuntu?