You can't start the default 747 form cold and dark. You can make so that at at the start of the flight its engines are off, but (differently from the panel of the 737) there is no avionic switch to make it dark, that I know of.
To start the engines from zero you click on the knobs on the overhead (whatever there is of it) to begin the spool up of the engines (one at time, ideally) and when n2 reaches about 20% put the fuel cut lever of the engine being spooled up on the throttle quadrant on "close" and the engine will start up.
This is about it. It's a default plane after all.
