Using a torque wrench to loosen bolts will damage the calibration (there may be exceptions, but I don't know of any). Use a breaker bar for loosening.
Thanks for that warning. Another tool to buy and carry! (Albeit, only on long trips.)
You can get a compact floor jack instead:
2 ton Compact Trolley Jack
I think it's a little bigger and heavier than the scissor jack above, but not by much.
That looks to be a lot bigger and heavier to carry in the car. Anyway, I don't get the concern; I tested the scissor jack and it is plenty sturdy and stable enough to lift a corner of a Model S on an occasional basis. If you don't believe me, there isn't much I can say beyond that.
For me the everyday tools will be:
• plug kit
• pliers
• 12V air pump/light
• jack + hockey puck (as someone pointed out in a post elsewhere, a fully deflated tire might not be able to be re-inflated with a small air pump if the bead isn't sealed and using a jack to lift the car somewhat helps with that)
• tire pressure gauge
• gloves
• tarp or old blanket
• cell phone for "plan B" towing, assuming that I am in a cell reception area (not always the case in the mountains)
Additional tools for long trips away from home:
• spare wheel/tire
• torque wrench, 21mm socket
• ½ inch breaker bar
• folding four-way lug wrench
Not that I expect to change a tire on any given trip but I've had a lot of flat tires over the years and I don't live anywhere near a big city, much less a Service Center, so being able to self-rescue is helpful.