http://www.ma70.com/bishop92t/techtips/index.html
has compartment pics. (bottom of page) that will help if you need to view something on the fly.
http://www.cygnusx1.net/Supra/Library/TSRM/MK3/
Toyota service and repair manual. #1 bookmark for supra owners.
toyota supras have FFIC (front mount intercoolers) same side piping.
one runs into the 3000 pipe the other to the turbo.
the trubo exhaust is Bolted onto the elbow. it goes, Turbo / Turbo Elbow / Downpipe / cat / resonator / muffler
hope this gets you started.
goodluck. keep us posted.