There is a word of letters three, Add one letter to it and none there’ll be. What is the word?

What comes in many varieties and can't be seen or touched, but it often makes you move?

What cleans as it gets dirty only to get clean the more you use it?

Ms Red lives in a red house, Mr blue lives in a blue house, Ms pink lives in a pink house, who lives in the white house?

What comes with your car, but travels more than your car?