If you can get Chicago fig plant, or black mission fig plant, those are cold hardy, they might survive in Toronto climate, I went to one nursery yesterday, they only got the indoor type, the Italian fig tree, kind of disappointing.
I saw a lot of such a fig tree in the south. And this is a message I can get about how to care fig trees in cold area:
Fig trees are semi-tropical in origin. They thrive in areas where winter temperatures do not drop below 15°F (-10°C). Very young trees can be damaged by fall frosts when the temperature falls below 25°F (-4°C). Fig trees will grow in a variety of soils ranging from sandy loams to clay loams.
I guess in Toronto, the Winter outdoor temperature might be lower than -10°C. Therefore, it is not easy to keep them alive. Anyway, it might be a good try if anyone wants to grow such a fig tree. I will be certainly very glad to see it grow successfully here.
Winterize the plant before winter might help if get the right type of the plant. I heard people have planted fig trees in their back yard in Toronto area, they must have gotten the Chicago fig trees.