Help Setting up Second Hand Printer

So the backstory behind this is that I bought this printer off fb marketplace about 5 years ago, found out it had some issues, and basically haven't touched it since. Now that I'm in a position to start working on it, I'm looking for some help getting it ready to print. These are the current issues I'm having.

1. After it's turned on, the screen says the nozzle has a negative temperature, and if I attempt to heat it up to start a print, it gives the "Heating failed, Printer halted" error. I've read this is probably due to a broken thermistor, is there any extra knowledge or tools I need to replace it, or can I just buy the part and swap it out?

2. Whenever I use the auto home, the print head rises about an inch, and won't go any lower. Is this intended? Or is this something that also needs to be fixed.

3. I'm not exactly sure what I'm looking at down there, but I honestly can't tell if what's attached is actually a print head, could I get confirmation on that? if so, is that also just a part I can buy and replace?

Any help would be greatly appreciated! I'm very new to this so I figured this might be the best place to start.