What is minimum electrical required to start my car?

You only need to power the starter and ignition if you have a mechanical fuel pump. It should run with everything else dis-connected.
The most common no start failure other than a dead dual ballast resistor found on the earlier 5 pin modules would be a bad pickup coil (usually a broken wire where they pass thru the distributor housing. A quick and dirty test would be to unplug the distributor and hook a volt meter to the two wires coming from the distributor-with the rotor shaft turning the pickup coil should produce enough intermittent voltage to pulse the volt meter. If you don't have voltage, no module is going to work.