Are you certain you can use a Touch with TomTom?
That is the question I'm asking. I hope so!
Probably only if it had a wifi connection.
Yes it will work on iPod Touch also.
Maps are downloaded from the Store (about 1Gb) and won't need a connection to work.
The GPS Receiver will be in the TomTom mount.
Traffic updates won't work as there is no 3G in the iPod Touch, although they may allow you to pair with a bluetooth mobile phone as the TomTom standalone unit does.