From the airport there is only one registered transport provider, what they say goes. If you can, it is better to have transport arranged ahead of time. The main way of getting around phuket is by open backvans they call "Tuk Tuk's". Scooter hire is available for about 250 baht a day or cheaper on a weekly or monthly basis, however this isn't recommended as most travel insurancewon't cover this and it can be quite dangerous. A private city tour driver can be hired for about 1200 baht for 5hrs or 1800 baht for 8hrs, this can be useful for a day of exploring temples and hard to reach places on the island.