1995 Mitsubishi Lancer Transmission problems

Hey, I've just done my first engine and (Tiptronic) gearbox replacement for a broken lancer GSR I was given. I just got to the point where I can start the car up. It started fine first go and runs nicely, but the car still wont move once I put in drive 1 or 2, or reverse. I'm not sure if I have been ripped off by being sold a broken gearbox, or maybe putting the wrong fluid in the transfer case? (ATF)
Before the engine and gearbox change, the gearbox would select gears but unselect them while driving.
I used the same tool converter from this gearbox on the new one.
Could this be the problem?
or sold a dodgy gearbox?
Maybe the wiring on the gearbox?
What's the right fluid for the transfer case on a 1995 Mitsubishi lancer GSR tiptronic?

Please help!