Yes you can.
If you have an jailbroken iphone you can get it for free
Some of the newer TomTom gps systems include Urban Rider, Start, Start2, Via 110, Via 120, Via 125, and Go 1005 live. For iPhone, there is TomTom app for iPhone and TomTom car kit for iPhone.
Yes, Navigon works flawlessly with TomTom's Car Kit.
One of the best GPS apps for the iPhone 5 is the TomTom GPS app.
You can't. Map updates are not free. You must pay for them.
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Yes, there is. The application updates maps frequently, calculates the approximate time needed to reach the destination, frequent traffic updates, and speed cameras. The application is not free and must be bought from a store, or online.
Amazon is a great company to purchase a Tomtom GPS system for under two hundred dollars. With free shipping and new as well as used prices, Amazon has great deals on Tomtom products.
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.
Yes, the tomtom car GPS does require map updates. The updates can be found on the actual tomtom support page. They are free and easily uploaded. http://www.tomtom.com/support/support.php?ID=3&Language=4
Yes, emailing is free on the iPhone.
The iPhone 4 isn't free.
TomTom's population is 3,500.