Polite, everyday word for money. The honorific prefix お makes it more courteous than plain 金 (かね). Used in most normal situations.
See also: 金 (かね)
How much money do you have?
この本はお金がかかりました。
This book cost a lot of money.
He earns money through a part-time job.
I'm saving up money for a trip.
I borrowed money from a friend.
Studying abroad costs money.
I paid the money at the register.
I have no money this month.
お金 is the common, everyday word for money used in daily conversation, while 金銭 is a more formal or written term used in legal, economic, or official contexts.
お金 is the everyday, general word for money, while ドル in this sense is slang-like and specifically evokes dollar bills or cash.
お金 is the everyday, general word for money, while 通貨 is the more technical term used in finance and news reporting.