Maybe not specific to Toronto, but chocolate bars such as Smarties, Coffee Crisp are popular in Canada.
https://candyfunhouse.ca/blogs/aroun...ate-candy-bars
I’d suggest going to Dollarama to buy chocolate bars, generally cheaper there than grocery stores.
Or maybe something from Vachon
Home | Vachon
I’m a fan of Passion Flakies and Ah’ Caramel.
Hickory Sticks if you want a salty treat. Ketchup, All-dressed or dill pickle potato chips.
Maybe get a box of Kraft Dinner to compare with the US version.