It is impossible to live without money if you live in a society where everything depends on money.
It is practically impossible in today's capitalistic society, but money isn't actually essential and there are other ways to function without it, but money is the best system we currently have.
We need to pay for everything what is necessary for life and that include food, water, electric energy, health care and many other things. If you have no money to pay for all that you will have terribly hard life probably on the street. Only way that the money does not play a major role in our life is to try move out from civilization and live life by the nature and from the nature.
In the society we live today this is true (and is probably the most ideal way), but what did people do before money existed? We used a bartering or trade system. For instance, you have a cow and you exchange it with someone else for six months worth of corn or something. Or an electrician would re-wire your house if you did all the painting and decorating in theirs. A granny might swap you a sweater she knitted in exchange for your beef jerky you made and so on and so forth. That's how it worked in the old days but it wasn't an ideal system but it worked well enough for the time so like it or not 'money' is probably the best thing we have right now..
But even in such case money can not be completely expelled from the equation of life, humans are just create such a society in which we depend on money. Problem is that some let's say 5% of human population hold 90% of world wealth, they have so much money that at one point it becomes a trivial thing for them.
Obviously greed and materialism is a huge issue but that's never going to change and greed is as old as mankind itself. I think as a society we should be better educated about the sickness that is greed and materialism. Do we really need flashy cars and super expensive clothes? Not at all. Look at the root cause of why people actually want to spend $250 on some Gucci flip flops or $250k on a Lamborghini. I know why people do, though: insecurity. Buying such things as designer clothing and Lambo's is called conspicuous consumption and is done so as a status symbols to show how 'wealthy' you are to others.
https://en.wikipedia.org/wiki/Conspicuous_consumption