Toronto can get pretty cold during the winter though definitely not as cold as Manitoba (I grew up there with coldest temp I've experienced being -56C).
I suggest looking into community groups that are from the same geographical area. There should be a few around since TO is one of the largest cities in Canada.
It's a big place. My preference would be to find a place to live on that's close to GO (commuter train) or subway to avoid driving. The 401 can be really fast but mostly at a snail's pace.
Since *NIX is it, look into the various city's job boards (TO is a Megalopolis) as *NIX is not that uncommon there. The smallish city of St. Albert where our business is runs a lot on *NIX. Mississauga is one place that's fairly heavy in tech. Guelph is another. Canadian distributors that may be hiring are SYNNEX Canada, Ingram Micro Canada, Tech Data Canada, and maybe ASI Canada.
If any recruiters reach out make sure to vet them first. Be cautious around big promises.
Things to do: Visit the Tower, catch a Blue Jays game, catch a Raptors game, catch a Maple Leafs game. Check out the various districts like arts and music.
One of my favourite times in TO was spending an entire day going about barefoot (the city is that clean) with my sandals strapped to my belt. They'd go on when entering a building but otherwise they were off. Subway, to trolley, to city bus from park to park, area to area, my buddy and I had a great adventure.
It's a great city.
EDIT: MeetUp is a great resource.