Q: stolen ipod touch how can i find my serial number

Do you mean the serial number from the iPod? If so, do you still have the manuals and the box? There you can find it sometimes.

On your iPod packaging

If you still have the original packaging for your iPod, you can find your serial number on the barcode label that is affixed to the packaging.

On your iPod invoice or receipt

Some retailers may include the serial number of your iPod on the receipt.

Online at My Support Profile

If you used your Apple ID to register or purchase your iPod, you may find the serial number listed in My Support Profile (available in the United States and Canada). Log in with your Apple ID and find your iPod in the "My Products" box on the main page:

Note: You may have more than one Apple ID and not realize it. For more information, visit My Apple ID and click "Find out."

copied from iPod: How to find the serial number

If you have a backup of your iPod listed in iTunes/Edit/Preferences/Devices, hover over it with the mouse pointer, the serial number will come up in a small window.

where in the manual do u find your ipod touch serial code

The SN is not in the manual. It can be fourn where indicated in Ingo's reply.