There is a website called The Toll Roads dedicated to toll roads. On the site there is a map showing the toll roads. There is also information about payment options, an FAQ and much more.
40.00
None if you are taking I-75
Zero
This really can't be answered without knowing exactly which toll road/route you had in mind. It varies between toll roads/routes.
Not that much
Toll roads aren't bad since they represent some of the best roads in the U.S.A. Instead, it's tolls which are bad. This is because they are inefficient since they are expensive to collect and result in the loss of matching federal highway funds; they result in wasted gasoline, additional pollution and numerous accidents (including some deaths) at toll plazas; and are unfair to drivers on toll roads because the gasoline tax is not used for toll roads and surplus toll revenue is used to subsidize other state operations.
how much are tolls between st louis and washington dc
They are toll roads
Florida
since most states do not discount toll roads for age, contact the applicable state, "dept of highways"
Not usually. You simply pay the toll-fee and drive on.