had the GT86 for 2 and a half years.
great car, not very refined or comfortable but great fun car to drive.
I’m 6ft2 and you could only get an ice scraper between back of driver seat and the rear seats!
i would doubt very much that you’d get 4 folk in it unless they are pretty short. the back seats are more for show than use due to the low height and tiny legroom if anybody in the front seats.
best go have a look in one to see if it would work for you but i’d doubt it.
ownership was pretty good with no major expenses, toyaota warranty is great, had a squealing brake issue which they resolved. ecoonomy is not bad, 40ish on long run up A9 with fully loaded boot included a dismantled bike.
word of caution though, as its RWD you have to be a bit more careful and it is fun but you have to watch what you’re doing when pushing it.