I have searched and got one hit which didn't give me any good answers!
Secondly, yes I have read the intro which says that all cars after 1 January 1996 but seriously that doesn't answer my question. Is there any way I can get any info out of that car, not only with OBD-II
No there is not easy way. I had an '91 MR2 and although there is some kind of system (cannot remember what it is right now) it's not standard. Not even OBDII. If you want to pursue further might be better to ask in a Toyota forum, that's how I found out mine IIRC.
If you don't want to buy a new car you could look into attaching sensors for what you want to read off (You need Mass air flow, speed and fuel trim for MPG for example) though once again you will have to search and research what you need and write custom software for it.
Ford Focus MP3 : www.stevieg.org/carpc Blog Updated 29 January 2009! Car PC Status: Complete - Undergoing Software Redevelopment
I may be mistaken but I'm pretty sure you should have no problems getting OBD-II info from your Celica. I have a Corolla 04, that I have had no problems extracting info from. I have the scantool.net kit!
Toyota Corolla 04
Panasonic 7in In-Dash
2x20 Character LCD