bobditty,
A couple of things just came to mind:
1. I know it seems obvious but you want to make sure you have your power supply cable seeded properly. If it is not then this could explain why the charge and GPS is not working (with my 1st Gen Touch the GPS will not function if the power is not plugged in).
2. There is a Tomtom Car Kit tool app. I do not know if this is required to setup your ipod with the GPS. You might try running that and see what it says. Again I think the GPS requires the power.
And one question, if you put your old iPod Touch in your car kit does it continue to function. If it does then this can give you a confidence that the car kit is still working, power, GPS, and all.
Thanks again for your feedback. It may save me from purchasing the new Touch as I love this car kit!