Hi wasabeenut,
Thanks for visiting Apple Support Communities.
It sounds like you iPod classic was synced to a Mac, and now needs to be formatted to sync to a PC.
If the PC is automatically ejecting the iPod, first try placing it in Disk Mode and restoring it using iTunes on your PC:
Putting iPod into Disk Mode - Apple Support
- If necessary, verify that your iPod has a Click Wheel.
- Before placing the iPod into Disk Mode, verify that it is charged.
- Toggle the Hold switch on and off (set it to Hold, then turn it off again.)
- Press and hold the Menu and Select buttons for at least six seconds, until the Apple logo appears.
- When the Apple logo appears, release the Menu and Select buttons and immediately press and hold the Select and the Play/Pause buttons until the Disk Mode screen appears.
- Connect the iPod to your computer; the screen on the iPod will should say "Do not disconnect".
Restoring iPod to factory settings - Apple Support
If the iPod is still not recognized by iTunes on the PC, see this article for more troubleshooting help:
iPhone, iPad, or iPod not recognized in iTunes for Windows - Apple Support
Sincerely,
Jeremy