To import to a computer photos taken by or saved to the iPod see:
iOS: Importing personal photos and videos from iOS devices to your computer
To sync media to the iPod you synced them from your iTunes library.
If you have iTunes 11 turn on the Sidebar. Go to iTunes>View and click on Show Sidebar. You can also do a Crtl+S to show the sidebar. The sidebar is where Devices appears. and Control+B to show the Menu bar
To import music into your iTunes library on the computer go to iTunes>Help>iTunes Help>Add items to iTunes and follow the instructions
To sync to your iPodgo to iTunes>Help>iTunes Help>Sync your iPod....and follow the instructions.
It the iPod does not appear under Devices in iTunes ee:
iOS: Device not recognized in iTunes for Windows
or
iOS: Device not recognized in iTunes for Mac OS X