My car does nothing when I turn the key

You need to check the wires going to the starter. Is the small wire to the solenoid connected to the correct post? Double check all the wiring connections and the battery connections. Is the battery showing 12+ volts? Do the lights work?

does that solenoid wire get 12 V when you hit the key ?

Yes. The Solenoid wire is sent 12 V when you turn the key to start. If you have no power when the key is turned, check the neutral safety switch.

Where's the neutral safety switch located?