Jimmy Said:

How much money should I bring to Europe?

We Answered:

the usual problem; if you were to go to all these places in this short time frame you won't see anything, you'd spend all your time and money travelling. So can't answer your question because this itinerary is impossible.

think about it: 10 countries in Europe, even if it is just 10 cities that needs about four days minimum in each. Same for the Australian cities.

go and work out a reasonable itinerary and try again. Incidentally this won't be your only holiday ever.