I suggest you start taking pictures before dismantling something and use masking tape to label the articles once removed.
#1 - Upper bracket for the power steering pump.
#2 - Is a vacuum hard pipe which mounts by runners #5 and #6 at the union of the upper and lower halves of the intake plenum.
#3 - Personally I wouldn't have even tried to take that apart... but you got it apart and with a little kick to the memory center you'll probably remember how you did it.
#4 - Is part of the EGR plumbing. It connects at the rear of the surge tank. Be sure to clean out the rest of the EGR's plumbing which runs into the surge tank and exits at the union in the center of the Y pipe.
EDIT: Here's a diagram which shows most of the vacuum hose routing. The hard pipe is all the way to the right.
http://www.cygnusx1.net/Supra/Librar...spx?F=1708&P=2