If I wanted to start all 727 flights at the gate with all systems powered off so I can have the satisfaction of powering up the plane how can I do it?

Second question, in certain takeoffs there's an audio conversation between the captain and the female copilot. She calls out speeds and such and the captain talks back. In other takeoffs the conversation is absent for mysterious reasons. I never mess with any settings that I know of, this appears to be random.  Do you know what's going on?