http://www.reddit.com/r/csbooks
http://www.reddit.com/r/mathbooks
http://www.reddit.com/r/eebooks
http://www.reddit.com/r/econbooks
http://www.reddit.com/r/physicsbooks
And not just books, but there is a tremendous amount of useful technical informaation, tutorials, articles, etc. on the web that are free. Heck, you could spend a lifetime just reading papers from Citeseer or ArXiv.org.
OP: it might help if you told us a little more about what you're interested in, what kind of projects you're working on, what kinds of things you want to work on, etc.
Also, regarding the money thing... at the risk of stating the obvious, have you approached your parents or other relatives about funding some of your ideas? I mean, a domain name + cheap VPS really doesn't cost a lot... maybe they'd front you what you need to get started, and if you make something that actually makes money, then so much the better. If not, it's still a valuable learning experience for a fairly small investment.