On the vast majrity of 1992 OBD1 vehicles, removing the positive battery cable for 15 minutes will clear all codes.
Have to remove the transmission.
There isn't one. These models use a throttle position cable instead.
same motor, same driveline, same size, just electronics differ a little ( such as a/c or power locks etc..).
Follow your red or positive cable from the battery down. It is connected to the starter.