Wool base layer, insulated mid layer, rain/windproof outer shell. They key here is too add/remove layers as needed, dictated by the weather and how active you’re being at the moment.
As a heterosexual man, the game went from utterly unplayable to game of the year. Magic I can suspend my disbelief for. But a lack of johnson physics? That’s a step too far.
If you 3D print, heat inserts. You can use them to insert metal threads into a printed object with a soldering iron to allow you to use standard machine screws in projects.
Not a mechanic but even if it is technically too old you maybe be fine if you keep it and in the event you get a flat simply replace the flat with a new tire, after getting to a tire shop on the spare.
You aren’t just heating up your own body w/ homeostasis, you’re heating up the air around you as it radiates off of your body. You will be warmer with tighter fitting clothes. Looser clothes can help with air flow, but if the air is -10°F air flow isn’t your friend.
Insulation is about trapping the air your body has warmed up next to your body, so you don’t need to constantly spend energy heating up cold air.
I’m not sure what sort of activity you’re planning on so I can’t give very good recommendations on exactly what to wear. But I would say just buy clothes that fit you. You probably shouldn’t be wearing so many thick layers that it requires you to go a size up.
Also keep in mind if you’re so warm you start to sweat, once you cool down that sweat is going to make you feel even colder.
Again wear wool, Merino wool if you can. Don’t wear cotton.