Probably worth checking out REAPER and AUDACITY as a first port of call
You basically need a sequencer/sampler as your DAW - you can then get hold of samples, loops, sounds etc. of which there are plenty of free ones available on t'internet
I would also recommend getting hold of a copy of COMPUTER MUSIC magazine, which comes with a DAW, plugins, samples and loops on the cover disk!
Any of these routes will get you up and running in no time with very little investment if you have suitable hardware