Sounds like the problem may be in the ignition switch. Is the fuel gauge indicating a quantity when you are cranking the engine, or does it remain at empty?
Try putting a temporary wire from the coil positive terminal to the battery cable side (hot side) of the starter solenoid. Then try starting the car.
Some words of caution:
This jumper wire will be unfused, so make sure that the connection to the coil won't vibrate loose and short out.
When the engine starts, you won't be able to shut it off with the key. Depress the clutch pedal, put the shifter into any gear, depress the brake pedal and hold (firmly), and stall the engine by slowly releasing the clutch pedal.
You could also get out of the car and remove the jumper while the engine is running.
John
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