Due to the almost complete absence of competition from public transport, the prices for tourists by taxi incalculable, and may be any, as elsewhere in the East, it all depends on the skill and desire to bargain. Despite this, though in some places in order to prevent the complete lawlessness in the pricing of taxi drivers, they put a table with official rates.
Alternatively, you may be lucky to catch a private driver. The cost of a van for 8-12 people for 2 hour trip to the city 20 USD per person.
The const of parking 0,13 USD = 0.05 OMR for a half an hour from 8 am to 13.00 and from 16.00 to 21.00 Rest of the time, as well as Friday and public holidays - free.