Q1: No voltage at CPS. The CPS generates its own voltage pulses.
Q2: What you observe is normal for an off injector with ignition on.
Power (12V) goes through the injector resistor pack and then to each injector. The white wires go to the ECU and are grounded (by a big power transistor inside the ECU) when an injector is commanded to fire.
When an injector is off, the white wires are effectively open-circuit, and you will get no voltage drop across resistors or injector solenoids, hence seeing 12V on the white wires.
Q3 A bad IGF signal will cut the injectors pretty quick, but you should see a few pulses before the ECU shuts them down.
Sounds to me like you jumpered the wrong terminals when you did the diag test. The fuel pump comes on if you connect B+ to FP. You want to connect TE1 to E1 for diag. It must flash (every 0.2621 seconds) if no codes are set and TE1 jumpered to E1.
If you remove the CPS and spin it by hand you should get spark with the ignition on.