For the most part, if the cadet needs it, the item will be issued to them upon arrival. As stated, boots have historically been encouraged as a pre-arrival purchase, but there are generally several brands/models that would be considered "in regulation" - so I would suggest waiting on official paperwork to know what they would like you to get for the upcoming year. It is generally not a good thing to be "different" as a 4th class cadet, so I would suggest getting something off of the official list that is sent to you.
I know it sounds weird sending your student off to college with essentially the clothes on their back, but --- that is what you do here. Things like a personal printer could come later - like Parent's Weekend, but there will be little wiggle room for other things in the first year.
For wisdom teeth, I had mine done at the base hospital as an upperclassman. If it were me, and you could wait, I would do it as a cadet to 100% ensure you are doing it the Department of Defense way and not jeopardizing your medical qualification status. FWIW, I also had my laser eye surgery at the base hospital at no cost.
Typically, you are required to have a Passport for the student upon arrival - so I would agree with the others on getting that out of the way.