1 - Anytime a manufacturer discontinues a model they will still honor warranties and perform maintenance. No reason to think fees will change.
2 -
http://www.fueleconomy.gov/feg/noframes/33960.shtml
3 - In general Chrysler minivans are a better deal in respect to price, features and option packages. The biggest negative is their reliability isn't quite as good as other minivans.
4 I have no idea if that's a good price in Toronto especially since you are talking CND and not USD (I assume).