If you're changing the color dramatically, the only real way to do it properly is to yank the engine, pull all the glass, and remove all the door/sill trim. You do not need to gut the entire interior, all you need to do is remove enough trim to allow spraying the inner door/hatch surfaces.
If you're not changing the color (or just don't care) you can mask everything with the glass in, and just pull all the trim, bumpers, lights, etc, etc.
So far as pricing goes, anywhere from 2-10k depending. You can save a lot of money dis/reassembling everything yourself, though most shops won't touch a car (at least with any sort of warranty on the paint) if you do your own prep.
A few tips specific to the AT:
1) Disassemble the hood. Do not try to paint it with the scoop insert in, nor the washer nozzles/grills/trim.
2) Remove the mirrors AND the doors. It's next to impossible to paint the doors well with them on the car.
3) Remove the front fenders. It's next to impossible to get the prep and spray correct with them on the car. While you have them off, paint the back with POR-15 to prevent corrosion.
4) The rubber gasket around the rear glass can be pulled back slightly and masked under, without requiring that you remove the glass-- however, if you do this, do not let the rubber get cold, or it will be very difficult to get back down after painting. Also make sure the paint is completely dry before releasing the tape, or it'll stick to it permanently.
5) Paint the bumpers off the car, same reasons as above. Use A LOT of flex agent for both, as they always require some tweaking with the corner bolts. If you don't do a good flex primer, the paint will chip and flake off the bumpers very easily, especially the CS bumper.
6) Remove the sunroof to paint it, especially the gasket in the roof.
7) If you're spraying yourself, be VERY careful to use light coats on the roof near the rain grooves. It's extremely easy to get too much paint in them.
8 ) Remove the rear inner fender liners prior to spraying.
