I love my Prius, and being able to drive electric. Have you considered owning a hybrid vehicle.
I have considered that, but I feel like I don't have enough knowledge about it.  Is your Prius both electric and gas?
I have a Toyota Prius Plug-in Hybrid, so I can plug it in or use gas if necessary.
How far does your Prius go on just electicity alone?  I'm always afraid I'll be out driving somewhere, and it will just go kaput.
I am not really sure what mine gets, they vary.
Does it give you some kind of warning if you are running out of power, and need to change to gas
It changes automatically, but you do have a battery gauge, like your cell phone does.
Oh that's very handy.  Also, when you are driving on electric, is your car really quiet, like a golf cart?
It is an electric generator, so it is quiet.