Questions about 3D printing for fnaf cosplay

Hi!

I'm considering buying a 3D printer, mostly because I'd like to work on making a good fnaf cosplay for the new movie! I'd like to be able to use the in-game models (or at least, as close as I can get), and to be able to construct strong simple Arduino animatronic components, so I figured a printer is the way to go. However, I'm totally inexperienced when it comes to this stuff, so I was hoping I could get some help with these questions:

  1. Any suggestions for printers (not too expensive, as I'm a student)?
  2. What size should my printer be (I want to at minimum make a mask for a human head)?
  3. As far as essentials go, do I need more than just a printer, filament, and modeling software?
  4. Is there a preferred filament for larger projects like this, or does anything work?
  5. What are some common mistakes that people new to printing make, so that I can try to avoid them?

Thanks!! :D

TL:DR

Questions from a novice about printing. My goal is making a lore-accurate fnaf cosplay.