Gas stations now accept both chip and pin and magnetic stripe at the pumps. Gas is more expensive than in NJ.
You can get the metro to the big orange julep place. Namur metro stop is right over the road from it.
My advice is to park the car and leave it there.
Other weird Quebec driving things, there are very few pedestrian crossings, you watch the lights and go when it is your turn, traffic gives way to pedestrians. Also bike paths are all over, the bikers have the right of way no matter what, even if your light is green. Lots of one way streets in Montreal, sometimes I think they are designed to keep me downtown as I have a hard time going west without odd little short cuts.
Traffic warnings are all in French. So when you are driving and see a huge digital sign above the highway full of French, it will not show up in English next. I listen to CJAD 800 radio station for traffic reports every 15 minutes, but it only helps if you know where you are and know where you are going.
Learn est is east and ouest is west, you will need it.
Parking is a pain in the butt.