Star Tours has a wheelchair ramped entrance/queue which takes you up and round the ordinary entrance, and you meet at the top. From there we were taken to the exit side and after parking up my
scooter we were led in via the exit where they'd left the front row empty for us.
Test Track I took my scooter right through the queue/car designing section right up to the platform, where they took the scooter with the key and, while we were in the ride, moved it to the exit side of the platform.
Pirates won't allow scooters in. I had to park up and use my stick - and the ramp up was actually quite difficult for me. There is a wheelchair entrance, but you have to wait round the side and someone will come and get you and take you in that way.
Buzz Lightyear also won't allow scooters in - probably because of the narrowness of the ride loading area. While we were parked in that area (the scooter parking place is with all the strollers next to the entrance to the TTT), I went up to the TTT on foot/stick (again, the slope is a killer if you have dodgy knees). We also walked across to
Carousel of Progress. I don't know if you can take a scooter in there as I didn't try, but you can definitely take a wheelchair: the special spaces are right in the front.
I don't think you can get onto
Jungle Cruise in a scooter: I left mine on the dock. The same with Kilimanjaro Safari at AK - but they do funnel you off to a different queue as they collect a few up and put them in a special ride bus which will take wheelchairs.
This is just a selection, of course.