@wein msafer...

next u'll be asking for taxi fare per kilometer...u might also go to the extent of asking for fares during the day and night...
next u'll be giving a list of places u wanna visit and approximate fares for your destination...

i guess u better stay where u r.....
on the other hand if u do happen to land in doha...there are limousine and taxi counters at the airport,,,,go help urself...yes finding a taxi is a tad difficult at times, so Karwa on the number already given to u in advance and they'll come and pick u up from wherever u r in doha..
hope this helps