Toyota: My first Toyota, and all these bottons:), 1991 toyota camry, toyota camry

Question
I recently bought a 1991 toyota camry,so far I like it very much. But I have these buttons and I don't know what to do with them. A shift lock overdrive,a overdrive, and a ECT,normal, power button. How should I have these set? And how and when should I use these?          Thank You For Any Help.
                                      Martha

Answer
Shift lock keeps it in gear going up or down a hill, overdrive gives the car another gear and the ECT is the power button used for over taking don't always leave it in power it wastes fuel leave it in normal. And don't always leave it in shiftlock it could damage or wear the transmission. If you need anymore questions answered please feel free 2 ask. Kind regards Dean.