Q: how can I transfer photos from my old i pod to my new one?

You should be importing all pics taken with your iPod to your computer regularly as you would with any digital camera.

From there you can sync them to any device you like.

This for photos in the iPod Camera Roll album

Transfer content from an iPhone, iPad, or iPod touch to a new device

If they were synced to the old iPod you have to sync them from the computer to the new iPod