yes a full day would give you access to both the historic streets and shops with a few of the inside views of historic places. however there are a number of museums that are well worth seeing in the Old Port so two days would be better.

Yes you can.

No, I did not. And I doubt that this is available in winter.

El presupuesto puedes adecuarlo según tu capacidad económica, pienso que debes empezar Toronto, que es el aeropuerto más conectado, dedicar un pasa día en Niagara, definitivamente Renta un auto para que manejes tus tiempos. Si sales temprano, visitas la catarata y como a las 7 8 de la noche ya estás de regreso directo a cn tower y el acuario que están uno a lado del otro y cierran tarde por la noche. Ya tu decides si te lanzas manejando hasta Quebec, pasando por 1000 islas y llegar en la noche, Quebec visitar mountmorency catarata, y la Isla de Orleans, por la mañana, por la tarde el viejo Quebec, así ya llevas 4 días, tomando en cuenta el día que llegas, y al día siguiente salir temprano porque son entre 6 y 8 hrs manejando. A ver si acomodas el vuelo que sea tarde o temprano el día siguiente.

La Voûte 360 St. Jaques La Champagnerie St Paul Est. Have fun!

Definitely Quebec City make sure you get an excursion with the falls and St Anne deaupre cathederal

Sorry I missed your question. It was just touristy for us, loved Mile End area though. What did you think of Old Montreal?

Yes there are great walking tours in English for free. That said, you should expect to tip your guide (because the one we had at least really deserved it) so it’s not really “free”. We went on a two hour tour that included the downtown, Basilica area, old Montreal and the old Port. It was truly an excellent and informative tour of the history, culture, and politics and of course the major sights. Don’t have name of company but found it by searching English speaking free tours.

I would NOT recommend trying to get to the old port with only a 5 hour layover. There is always traffic and construction that slows the trip in. Try Da Magnione or something closer.