Bali - it seems that every second male person in Bali is a transport boy!!!!
There are more Bluebird (best taxi company) taxis on the rd than you can shake a stick at, and outside every hotel is a cluster of transport boys all offering you transport.
Every time you get into a taxi, you will be asked the same questions
Where you from?
First time in Bali?
What is your program?
The first two are easy to answer, the third is designed so you will say, I want to go visit the Volcano, and I want to go see some temples, and I have to go see sunset at Tanah Lot - and then I would like to do a round the island tour.
My answer is always, sit by the pool and drink Bintang (the local beer) which confuses the hell out of the driver, as not tourist would want to do that, when the taxi driver has a great aircon veh that just needs your butt on the back seat and an open wallet throwing hundreds of thousands of rupiah at the driver.
Taxi at the airport, go to the taxi window once you leave arrivals, set price for all destinations. No taxi rank as such, the allocated driver will take you to his taxi, avoid the porter he wants some rupiah too. (note the quoted set price is just under twice what the hotel to airport will cost on the meter)
Uber - I would not bother - give the money to the local drivers who need it to keep a roof over their head, and their kids in enough rice to fill the stomach.
For a full day tour be prepared to pay between 600 000 rupiah and 1 million - thats about $100 USD - pretty cheap for what you get.