Open World Questions

New to the game, about 11 hours in. I've played tons of survival games but I'm hooked on this. I just have a few questions. I'd rather get info from people who have experience with the game than read through some add ridden article.

  1. Do the ore and coal respawn in the caves? I haven't been playing long enough to really know. I'm a habitual item repairer and I blow through iron pretty quickly. (Also iron bolts).
  2. I take it trees do not respawn? Not an issue as there are TONS of them, but is there a way to plant them? I like burning wood for charcoal for water filters.
  3. Are there many mounts? I have 2 Terranus currently. Just wondering if there's any other cool things to tame.
  4. Are the livestock only available through the workshop? I noticed I can get a blueprint for a chicken coop, and noticed the chickens and other livestock in the workshop but was wondering if they could be found on the planet and tamed.

Thank you for your help!