Money burns a hole in your pocket (http://www.usingenglish.com/reference/idioms/money+burns+a+hole+in+your+pocket.html)
If someone has money burning a hole in their pocket, they are eager to spend it, normally in a wasteful manner.
Money doesn`t grow on trees (http://www.usingenglish.com/reference/idioms/money+doesn%60t+grow+on+trees.html)
This means that you have to work to earn money; it doesn't come easily or without effort.
Money for jam (http://www.usingenglish.com/reference/idioms/money+for+jam.html)
If something's money for jam, it's a very easy way of making money.
Money for old rope (http://www.usingenglish.com/reference/idioms/money+for+old+rope.html)
(UK) If something's money for old rope, it's a very easy way of making money.
Money laundering (http://www.usingenglish.com/reference/idioms/money+laundering.html)
If people launder money, they get money made illegally into the mainstream so that it is believed to be legitimate and clean.
Money makes many things (http://www.usingenglish.com/reference/idioms/money+makes+many+things.html)
This means that money is important.
Money talks (http://www.usingenglish.com/reference/idioms/money+talks.html)
This means that people can convey many messages with money, and many things can be discovered about people by observing the way they use their money.
Money to burn (http://www.usingenglish.com/reference/idioms/money+to+burn.html)
If someone is very rich, they have money to burn.