This isn't the easiest thing to go by but it's probably clearer than any description I could try to put together right now.
http://www.cygnusx1.net/Supra/Librar...spx?F=5501&P=1
S in a circle indicates a screw. If you don't see it then there's a panel on top which has to come off first. Common hangups:
1) Foglight/accessory panel comes out first, one screw (underneath) then pull firmly straight back toward you.
2) Ashtray, 4 screws to remove and the wiring to the light above the metal cover can be a bit of an annoyance.
3) There's a screw under the ignition which people miss often.
When reassembling do NOT over tighten or you WILL break plastic tabs and/or the cluster trim panel. You don't need to remove the lower kick panel (the one covering the steering column, etc.) but you do have to remove one or two screws (see #1 and #3).