Hi Chris,
you can also ask the Price and the place in only one question: ¿Cuánto cuesta ir hasta (place)?
Depending on the country where you will take the taxi, it can also be interesting to ask them to use the taximeter, if they have one. Otherwise, they will probably try to take advange of you and charge you much more than they should. ¿Puede poner el taxímetro, por favor?
If you want to know if they have change, you should tell them with what note you would like to pay. ¿Tiene cambio de 50?
If you specify the country you will be visiting, I will probably be able to give you more advice.