What u can try is to connect it to computer again and try the step1:
- Toggle the Hold switch on and off. (Slide it to Hold, then turn it off again.)
- Press and hold the Menu and Center (Select) buttons simultaneously until the Apple logo appears, about 6 to 8 seconds. You may need to repeat this step
Step 2 to add pictures to ipod
Connect your iPod to your computer using the cable that came with your iPod.
When the iPod icon appears in iTunes, select it and click the Photos tab.
Select "Sync photos from" and choose the photo application or folder that contains the photos you want from the pop-up menu.
If you're using Adobe Photoshop Album 2.0 or later, or Adobe Photoshop Elements 3.0 or later, you can export photos directly from those applications to your iPod by choosing Photoshop Album or Photoshop Elements from the pop-up menu.
Choose whether to move all your folders or albums, or only selected folders or albums.
To also move the full-resolution versions of these photos to your iPod, select "Include full-resolution photos."
You should select this option if you plan to move the photos from your iPod to another computer