This Question doesnt make sense, TomTom is public company - http://en.wikipedia.org/wiki/TomTom , http://www.tomtom.com
You are correct in thinking that a Tomtom is a easy to use piece of equipment. Check out http://www.tomtom.com/ for more details or to purchase a Tomtom for yourself.
Probably approximately $100. There are used tomtom GPS devices for as low as $7 and as high as $210 on ebay. http://popular.ebay.com/consumer-electronics/tomtom-gps.htm
According to customer reviews the TomTom is pereferred over the Garmin in most cases for cost reasons.
Yes, TomTom GPS system are very reliable navigation systems. And a good professional can indeed fix it if anything goes wrong.
It won't cost anything. It will never cost anything to use.
with this: http://www.amazon.com/Tom-iPod-Connect-Cable-Audio/dp/B000FEKEN4 You can route your audio out from your iPod to your TomTom. Personally, I'd just use it as an iPod, I'd rather put them all on my TomTom as well as my iPod; it saves money. You can also use the TomTom Car Kit: http://www.theiphoneblog.com/2009/08/17/tomtom-car-kit-compatible-ipod-touch-gps-apps/ It's a GPS antenna that uses the TomTom GPS App for your iPod Touch/iPhone to put a map on the iPod display. You can also use other apps.
TomTom's population is 3,500.
WikiTree does not cost anything to use.
I find tomtom a little more confusing to use than gramin systems are to use. they are pretty difficult to enter information and to find specific locations.
I think most gps systems are quite reliable if you learn how to use them properply. The tomtom use to be the most reliable one and then competinion came out and many are just as good.
I would say yes that you probably do need a TomTom receiver with every TomTom GPS, however to be sure i would maybe go to the TomTom's website and see what it says.
There are several different kinds of TomTom GPS units. Most of their units will run the average consumer between $90 and $160, depending on what model you choose.