1. You need bluetooth to connect your phone to TomTom. I've got bluetooth, but never use the traffic thing cos it costs money. I find the radio is perfectly good enough for that.
2. Sorry about delay - had to find unit, then go outside for GPS signal. Haven't actually got that symbol on mine, although I do recall seeing it. Is it a bluetooth symbol crossed out, implying the bluetooth is off?
3. The docking is about connecting to your vehicle. You can make the night vision turn on with your headlights and get the unit to mute the stereo, but not sure how.
4. Not sure about the updates thing - have never tried it. I assumed you just plugged it into PC.