http://www.2rzturbo.net/?p=77 search for "compressor".
I assume you have AC controls and wiring. If not, you'll have to source the the controls. The wiring should be there.
Largely, you've got two options:
1) Use your 22RE compressor and the 2RZ/3RZ AC mount. You need to convert the clutch of the compressor to a 4-rib pulley, which is standard on 1st gen MR2s (I found indications that it may be common on 4-cylinder mustangs late 80s).
2) Use the 2rz/3rz compressor and build custom AC lines.... As you don't have AC lines, this may be a better option...
The rest of it you'll have to add from another 4runner - standard AC parts like evaporator, condenser, dryer, etc. Use appropriate seals for R-134a and buy a new expansion valve if you really want to do the conversion right.
You need to have the factory tach powered to trigger RPM on the AC amplifier.
