If you don't have car manufacturers of your own, you're probably best off buying Chinese at this point. They will spy on you, but so does everyone else and with Chinese cars you get the benefits of slave labour and near-free lithium batteries, environment be damned. We can never match that pricing in European cars.

The other great option is to tariff cars not built in Canada and watch car manufacturers build plants in your country, that's pretty much what the US and EU both do to protect the auto industry and it's part of the reason all of the big German and Japanese manufacturers have manufacturing plants in the US for example. Canada's a smaller population to cater to, but big enough for some manufacturers with high sales volumes to build their own manufacturing plants. I bet Toyota would easily do it.

Of course at present it seems more likely that you will remove the tariffs on European cars in exchange for us removing tariffs on some important Canadian exports. Still better than buying gigantic pick-up trucks, but our manufacturers are lagging behind with EVs since ICE cars are still cheaper to build than EVs outside of China.