I am guessing that it works
Two transistors, NPN to control an PNP..
Never guess in electronics. That circuit will not work.
But is there a reason why it don't work?
want arduino to control an PNP transistor. The case is that the arduino will not always be on, so I want the output pin to be HIGH when in use.
then it will lead through emittor and collector
After the mailman has opened and closed the lid, and the message has been sent, then the circuit will wait for me top open the part with the lock. It will then reset the circuit
There are quite a few blunders in that circuit, so it will certainly need a bit of work!"Q1" is drawn upside down. It confuses yourself and others if you show a ground symbol pointing upward. The ground symbol should be below the transistor and indeed, connect to the emitter, while the "LOCK" connection will be the collector. The current limiting resistor in series with the base is missing as indeed are those for your Vcc switching transistors.The diodes and resistor to ADC6 should not be there as they would be applying 12 V to that input. Whatever purpose you intended will need to be figured out when the rest of the circuit is fixed.The "Mailman" and "Admin" inputs should switch to ground, not 12 V. Via diodes, they can pull down the gate of a P-channel FET whose source is BATT+ and whose drain feeds HOLDV. A 10k pull-up would be between gate and source. While you can use transistors, the proper FET makes it a whole lot simpler. Then an NPN transistor with emitter to ground (downwards!) and collector to the FET gate will hold the circuit on when the 22k resistor in series with its base connects to "HOLD".If you have a go at drafting those things out, we can then check it again to see if you are getting it right.