@davepsinbox_157004 Thanks for the link to the information. From what I read, I am not sure that attempting to jump start the Prius by hooking the jumper cables would have done any good. I also have no idea how the Prius recharges the smaller 12 volt battery.
I have driven the Honda Civic Hybrids and the Ford Escape Hybrid, but I have no knowledge about how the gasoline engine was started.