多少钱一个？ 英语怎么说？

How much for one?

一个什么东西啊？
问价钱直接用 How much?或者How much is it/are they?好了

How much each one?

What is the price?
How much for one/each?

how much is it?呵呵，我在多伦多 Tim Horton买咖啡经常问~~现在基本上就知道了。

多少钱一个？ How much money one?