It is usually priced by square footage and you can expect to pay anywhere from five dollars a square foot to over twenty dollars depending on the company and type of materiel used.
To pave a driveway with ashfault cost more than concrete. The length of the driveway is measured by the width. It will cost at least a couple of thousand dollars.
As far as the materials mix, genrally a paver will hold 65 square feet per ton, and this is important when factoring in the size of your driveway, as on average you will pay around $125 per ton.