well obvioully its not a modern car for if it was then a 40$ ODB scan tool would tell me everything I need to know.
This more of a debug tool to use when your rushed for time. Track side or in the pit lane.
We typically have a mix of engines from a Chevy 1.6 to a suzuki 1.3 to a various other engines. All pre ODB. Or if they have ODB its not to an open standard. The company wants to sell you their 5000$ proprietary scan tool.

The idea is to just hook up each lead to each of the sensors. Signal conditioning has pretty much been covered in the Micro chip app note.
As you know typically all sensors will output a 0-5 volt voltage or a Resistive value. We basically need to know that the sensors are all working.
So your looking for RPM input at least 4 inputs for 0-5 volts and another 3 for resistance based measurements.

May have been faster for me to just read the data sheets.