Yes, but not as a shuttle. Enter the trip as a return between the two places, with the time of the first run out and the last run back, and when you make the booking request, mention under Special requirements that it is a shuttle. The coach company works it out itself and gives you its own price.
No. That amount is for one trip there and back, with waiting in between. A shuttle drives much more. The amount that counts is the one the coach company gives you afterwards.
That depends on the number of guests, how long one round trip takes and how quickly everyone needs to be there. The calculator works it out for you, without a price.
After four and a half hours of driving he takes a 45-minute break, and he drives at most nine hours a day. On a shuttle he is driving almost all the time, so a long shuttle needs a second driver or an extra coach.
No, it is a price estimate based on your route and group size, not a confirmation of availability. The coach company itself confirms the final price and availability after you have sent a no-obligation booking request.
No, requesting a booking is always free and without obligation. You are not committed to anything until the coach company has confirmed the final price and availability and you agree.
Enter the trip as a return, with the first and the last run. When you book, add that it is a shuttle.