Alright, first issue: Inconsistent starting habits.
After testing the injectors, fuel pump and relay, dizzy and everything else I could think of, it was left down to the Crank Angle Sensor. Sure enough, it was malfunctioning. New one was ordered through work and fitted today, and has done the trick. Starts up within the first couple of cranks now.
Next problem: Non-auto auto.
I had to manually shift through the gears as the auto box would simply try and take off from a stand-still in 4th if left in D. This was alright for a while, but the TC wouldn't lock-up on the highway either, which was seriously killing the fuel economy. I know these things aren't great on fuel, but 15L/100km on the highway was a bit crap.
Anyway, after testing the NSS and checking all fuses and relays for the TCU, the only thing left was to pull it apart. Found a thread on here from a member with identical issues, and his fix was to replace the solenoids. Rather than just do the two shift units, I replaced all three (TCC, Shift 1, Shift 2) as I didn't want to have to pull the pan off again to replace another further down the track.
2.5hrs on the hoist, and it was all done. Had a little issue with the clearance between the pan, exhaust and crossmember, but got there in the end. Put a filter kit and new oil in at the same time as the original ones were completely cactus. The cork was hard and brittle, and the oil was dark brown.
New gear all fitted up with fresh new oil, and it was running like a dream. Oil level is a little above the full marker, but not enough to worry about.
I'll be doing a full service on the rest of the engine tomorrow, so will hopefully get her purring like a kitten again.
After that will be a full new stereo system, as I got a decent Pioneer head-unit from a few friends for my birthday.
Just have to get the amp and speakers now.