First of all, -10 is warm here. Regularly goes to between -25 to -40. ๐ฅถ
Flex over ๐ญ Now advice:
Long johns help. Get a few pairs.
Get some nice warm gloves. Also Get some thick mittens as well, they keep your fingers warmer.
Plaid. No questions.
It doesn't hurt to know how to start a fire within and work a woodstove.
Boot liners might be an idea.
Snow shovels come in many varieties. Look them up and figure out which one might work best. Hint: metal edges are best for pavement, not grassy areas.
Get an Ice breaker. Looks like a small, flat shovel head. You'll thank me.
Got chocolate and coffee are a must.