Besides equipttment what do you need to make a good sturdy lawn care buisness?

Ive got the equiptment,ive got the labor,and ive got the yards,but what i dont have is facts on the buisness aspects of it.(I.E. what kind of taxes are there on lawn companys,do i need any sort of license for anything in landscaping? Whats the most effective way to get the companys name out. What yards are targeted most in the field,and do you think pressure washing and lawn care will go hand in hand?