I too have a slight problem with ambient air being a little warm after I've driven it, parked it, and take it out for another spin. I just switch on the air conditioning for about 30 seconds to rectify it.
As for some rattling in the roof headliner - I had the same problem. It was coming from the rear left of the roof, so I took it to Western Toyaota in Guildford yesterday, and they said that there were some loose wires in my roof. They tidied up all the wiring, reinforced it, and added some insulation to stop the noise from returning.
As for the sound from the sunroof, I also have this problem - only when the sunroof is open, but more so when it is in the "tilt" position. the noise emanates from the long piece of plastic at the back of the sunroof, and it stops rattling if you're willing to put one hand on it while you're driving
Yeah, as you've already said, there's not all that much you can do about the sunroof rattle.
By the way, my car is a V6 Azura.