What a nice question :) If I may, I would suggest that you can make music even with a stick hitting on a bucket. I think, at a first place, no budget or nothing whatsoever can limit your creative urge. Of course, if you have the good tools, which usually cost something, you can create more easily, but the essential thing one should have at very first place is the music inside. We as musicians/artists are transmitters of something higher than us, call it inspiration, joy, divine energy, etc. Whom do we transmit it to? Others. And I personally like that you aim at creating music that people would listen to. This is the creator's mission, namely to create something people would love listening, observing, to let them dream and disconnect from day-to-day bullshit.
So, back to the point, if I may suggest: 1) Ask yourself what music really turns YOU on; 2) Focus on that feeling and again ask yourself how you can transmit it to others with what you have NOW in your hands; 3) Do you really need tools and if so, why exactly and what for? How would a tool help you? What do you want to achieve and why?
I find a good and easy-to-use music making tool Garage Band that comes with a Mac and you don't need to pay additionally for it. It is also available for iPhone/iPad for free. And in this article they list TOP 5 free linux music creation tools: http://www.makeuseof.com/tag/top-5-free-linux-music-creation-tools-artist-budget/. It is probably worth taking a look.
PS: I'm adding here the link from my comment below to some cool stick-bucket stuff with apparently millions of fans :)