Can I use Media Player to download music to my iPod?
No, iPod can only be synced through iTunes. You won't even be able to find your iPod through looking through windows explorer, much less using mediaplayer or realplayer or any other type of program of the sort.
If you don't have the iTunes software, I believe you can download the latest version for free from the apple website.
I think Ipod only works with Itunes. . . http://www.apple.com/itunes/