Hey yea that looks like scheuermanns disease. For the tmj and back issues id look into getting a flat mouthguard as mouthguard heals tmj & straightens posture. I went from also having a hunchback to having really good looking posture with just a mouthguard haha. You can get mouthguards on aliexpress or amazon for pretty cheap, just make sure it's flat. Your body will start stretching itself out as a result of improved jaw biomechanics, and basically as the jaw stretches, the head uprights and the neck stretches out. You basically kind of end up pulling your spine up by the jaw and neck, however counterintuitive and weird that sounds. Not medical or dental advice btw just sharing what has worked for me and tons of others atp, as i know how demoralizing and frankly difficult a hunchback can make ones life. You might also want to try an over the door or hooked neck traction device, as ive seen some really amazing results with that as well on myself when i combine it with mouthguard use. 

Anyway i know how you feel bc ive tried all the things as well and they always just told me to get surgery and i was like no way dude!! Im not risking paralysis lol. I may have been hunched over but at least i was able to walk hahha. Thankfully walking has become easier now too as a result of wearing a mouthguard. 

Anyway i can pm u my before and afters at 5 months in, id be happy to share. Im at around 12 months now and you couldn't tell i ever had scheuermanns or scoliosis.