You are simply asking how much you would need to pay to do something.
你只是简单地问做某事你要花多少钱。

Here are some examples: 这里有一些例子：

"How much does it cost to fly to Europe?" 

坐飞机去欧洲要多少钱？

"How much does it cost to own a house?" 

拥有一套房子要多少钱？

"How much does it cost to play a round of golf?" 

打一局高尔夫要多少钱？

"How much does it cost to join a gym?" 

加入健身房要多少钱？

"How much does it cost to repair my car?" 

修理我的车要多少钱？

"How much would it cost to talk long distance?" 

长途电话要多少钱？

"How much would it cost to run a website?" 

运行一个网站要多少钱？

"How much would it cost to wash my car?" 

洗我的车要多少钱？

"How much would it cost to rent a car?" 

租一辆车要多少钱？

"How much would it cost to go to the movies?" 

看电影要多少钱？