It is cheaper if you have a doner car to get the needed parts off of. CAlll a couple of local garages for estimates. This is not a job for a back yard mechanic.
It would probably be easier to go to your local auto parts store and pick up an aftermarket manual, or get the factory manual from an eBay seller.
Auto repair manual for your car with electrical diagrams in it available at most auto parts outlets.
Toyota parts dealer can order a wiring schematic book for you. Suppliment to the mechanics manual they sell. Auntetr
There are many places where one can purchase Toyota Celica car parts. One can purchase Toyota Celica car parts at popular on the web sources such as Auto Trader and eBay Motors.
at Toyota
You can order Celica car parts from various companies that provide online ordering services. Some examples of these companies include Auto Parts Warehouse and Parts Geek.
The cheapest and fastest way is to harvest an engine, computer and parts from an existing 5 speed celica. taking an automatic motor to a manual is pretty invasive and sometimes difficult and probably would recommend both be done by a professional. Either way the fist option would be the best way i feel for a do-it-yourself.
Parts manual has information about car parts. The manual also show how to install the parts.
Get a manual on your car from the parts store.
Get manual from the parts store or from AUTOBOOKSONLINE.COM
A parts car like yours with an automatic transmission.
It may not have any if it has original parts.