Yes
Usually flour does contain wheat.
it is wheat that is ground into powder.
"White flour" generally does refer to refined wheat flour, so yes, in answer to your question.
Not really, wheat germ has a different flavor and texture than white wheat flour. If only a small amount is called for some whole wheat flour may work.
Benefits of Whole Wheat
Whole Wheat Twinkie
How to Bake Whole Wheat Brown Bread
Grain Farming in Northern California