Toronto's iconic vernacular is of course the Bay-and-Gable Victorian. Built between the 1870s-1890s, and characterized by, as the name would imply, the steep gabled roof and bay window on the front. They're usually semi-detached, but also come in detached & row versions, almost always on long, narrow lots. Inside, they're mostly a mix of 1-4 unit variations.
https://commons.wikimedia.org/wiki/F...Row_Houses.jpg
Even more common though, would be the Edwardian houses built between the 1890s and 1910s. They're otherwise the same basic format as the Victorians - just more numerous and spread further out into the city. They're characterized by the standard covered front porch, 2nd floor bay window, and 3rd floor dormer.
By the 1920s things had shifted towards less ornamented, more spacious semi-detached brick boxes. I'm not sure what this style is called, but some variation on these are ubiquitous throughout Toronto's streetcar suburb neighbourhoods.
Post-war, brick bungalows like these were thrown up by the thousands to house the rapidly growing population. 3-bedrooms, about 1000 sqft plus a basement suite, and they all look more or less the same.
And then of course, there were the thousands of quintessential 60s/70s tower blocks, which now house the plurality of Toronto's population. This particular style is a dead giveaway for being somewhere in Ontario.
https://www.archpaper.com/2020/09/to...rises-feature/
There are also more localized or neighbourhood-specific vernaculars, like the Beaches Duplexes.
Or Romanesque Victorians in the more upscale areas.
https://acotoronto.ca/show_building.php?BuildingID=2076