The books for a MK1.
Cruise----press the button in on the end of the lever, this enables the cruise control, should have cruise illuminated on the dash. At your set speed, pull the lever towards you, like you would to flash your lights, this will then set the cruise for that speed. Use of the brakes while using cruise, will cancel it, and you will have to set it again (the lever also moves up and down, but don't what they do as in jap writing, but comparing it to my old supra, it'll be cancel, and resume/accelarate trial and error)
Autobox--- leave it in D with O/D on for most of the time, stick it in sports when giving it large, to maximise revs (don't think it alters any timing/fuelling but might be wrong, working from memory as been out of the jap scene for a few years)
You may need to select certain gears for towing e.t.c restricting speed downhill e.t.c