Any normal crush washer should work. The idea of the crush washer is to slightly deform when you tighten the drain bolt, so that it forms a tight seal all round the head of the bolt and the oil pan. I just buy a pack like this and then I'm set for a while. If you have a bunch, it makes it easier to change your oil and have one less thing to remember to buy, plus it dissuades you from reusing the old one. Most of the time, you'd probably be fine reusing the old one, but I can spare the 50 cents, so I just use a new one every time.
For the oil and filter, I'd recommend going to the closest Jap Four dealer and get your manufacturer, or a similar manufacturer's 10w40 for 4 strokes, then go to the parts department and tell them you need a filter for your exact bike; almost guaranteed they have some in stock.
Gloves - if you go to the pharmacy section in walmart or a similar store, you can get 100 gloves for under $10. You'll pretty much never have to buy them again.
Here's a set of metal crush washers that are actually cheaper per washer ($.89 vs $.793 each). Again, get a bunch right away, and then you don't have to worry about it for a while.
Torque wrench - some people are recommending against that one, or even using one in general. There's nothing wrong with torquing an oil drain bolt, it's a little excessive, but you can't do anything wrong if you torque it to spec. That might not be the most accurate torque wrench in the world, but unless you're taking apart the motor, it'll be close enough for what you use it for. Plus by buying one now, you'll have it for future use, obviously it's not like it's only applicable for this one specific job.
I think they are 14x22.3 but other sizes might work okay. https://www.amazon.com/dp/B00K3B595M/ref=cm_sw_r_cp_api_PxEVybFFTKRX2
I actually just watched the oil change video from Jake TheGardenSnake where he links the crush washers he used for his 2016 FZ07. Thanks for the help!