my ipod touch wont connect to the computer at all. what to do?

See:

iOS: Device not recognized in iTunes for Windows

I would start with

Removing and Reinstalling iTunes, QuickTime, and other software components for Windows XP

or

Removing and reinstalling iTunes, QuickTime, and other software components for Windows Vista or Windows 7

New cable and different USB port?

Runs this and see if the results help with determine the cause

iTunes for Windows: Device Sync Tests

Try on another computer to help determine if computer or iPod problem

-Did you try another cable?

what did this show?

- Run this and see if the results help with determine the cause

iTunes for Windows: Device Sync Tests

- Inspect the dock connector for bent or missing contacts, foreign material, corroded contacts, broken, missing or cracked plastic.

- Make an appointment at the Genus Bar of an Apple store.

Apple Retail Store - Genius Bar

That is likely the problem.

Apple will exchange your iPod for a refurbished one for this price. They do not fix yours.

Apple - iPod Repair price

A third-party place like the following is less. Google for more.

Simple and Affordable iPod Repair Services and parts from iResQ