Ok first up, its not a simple plug it in and it will work, secondly, chances are alot of the info on the net wont help, as alot of the supras have different plugs and wire colours. I assume you found eb1 and eb2 plugs, if not they are next to/under the fuse box in the engine bay and mine were not shaped like those in the wiring guide on sm, (mine only had 3 wires into em, not the 5 shown etc) however you should be able to distinguish them from the other plugs in the area as they are similar. . . Also I dont see why you need an ecu pinout. . .not needed unless you are rewiring the car completely from bottom to top, plug pinouts are all you need if melding two wiring harnesses together. . . Thirdly, I probably haven't been much help, but heres the best piece of advice I can give you, if you cant work it out, take it to an auto elec and give them the plug pinouts, shouldnt take them more than 2-3hrs to wire it in, money well spent. . . add 2more hours if you want them to really make it tidy with new plugs etc. . .
Heres 2 links I used as a cross checking reference for wires and their purpose, just cause one sheet says connect red to blue, doesnt mean thats right, check and make sure that your connecting speed sensor to speed sensor etc. . . .
http://www.supras.nl/index.php?option=com_content&task=view&id=34&Itemid=50
http://www.supras.nl/index.php?option=com_content&task=view&id=38&Itemid=54