Best thing to do is get a hotel near old Montreal so you are near the largest selection of great sights, some within walking distance. Viewing the city from the top of the mountain, Even a simple ride on the Metro can be a treat for someone from Toronto, quiet, clean, and fast to almost anywhere. take a caleche ride around downtown and have the driver make some suggestions. Old Fort Montreal if history is of interest, the Casino if not. Distances are very short in Montreal, not like TO, but driving around can be tricky if your not use to it. Take the Metro or cab it around.