This is not my main area of experience but I’ve seen many “auto tool kits” and “auto emergency kits” over the years but I haven’t been very impressed with any that I’ve seen. They’re usually either of highly questionable quality or they are terribly overpriced. And quite often they manage to be both. This is something I think you’re going to want to put together yourself.
As far as tools go, I keep two flashlights, leatherman style multi-tool, 6-in-1 screwdriver, a basic 3/8 socket set, adjustable wrench, tire pressure gauge, and channellocks. No need to pack every socket in the set, take out any that you know you won’t need, and make sure that you have all the ones you might need for common repairs like replacing a battery or a spark plug. There’s probably not any sense in carrying any fractional size sockets unless you happen to be driving an older American or British car.
I also keep a 12v tire inflator, can of fix-a-flat, tire plug kit, basic first aid kit, wet wipes, spare fuses & bulbs, a bottle of radiator stop leak, cheapo work gloves, duct tape, flares, triangle, jumper cables, and bottled water as emergency supplies.
Make sure the cord on the inflator is long enough to reach all your tires from the cigarette lighter socket. Also make sure your jack is
b) works worth a damn.
I’ve owned vehicles in the past where the factory jack was more or less useless so I’d replace it with a better one. There’s also nothing worse than needing to use the jack only to find that it doesn’t work, the handle is missing, etc. Same thing for the tire lug wrench: make sure it’s there, make sure it’s adequately sized/sturdy, make sure it fits your lug nuts. If you have custom wheels make sure you have the special sockets for them. These days it’s not so bad with everyone packing a cell phone to call for roadside assistance but there are still times where it’s nice to be able to get yourself out of a pinch.