I am sending you a couple of web sites that you can view to decide price and what type of vehicle you want to rent. They are decently priced, but I don't believe that the price includes insurance, which I would suggest you purchase. Just make sure that you document any scracthes or other damage that is on the vehicle when you pick it up.
You know you are at the right place for your busing or coaching needs when you see this sign broadly displayed by the road! So at the very least, you know who is the one that designed ..or should I say, which government department is responsible for building the bus terminal...way cool!
It pays to do your research beforehand to know which part of Thailand you are going to or where you want to go. Then you can enquire about the fares and be given the right coach to the right place - your destination! Sometimes they leave on time, sometimes they do not..but MOST of them try anyway.
It is convenience to travel around to Trang's island by a little long tail boat served by local. A day trip only for 1,200 - 1,500 Baht.