Welcome to BOA

If you want to start producing, my advice would be to go and buy a copy of computer music magazine, The CD that comes with it has all the software you need to get started and is full of tutorials. there is no point is waxing serveral hundred quid on software until you know you are going to stick with it.

as for DJ'ing, I cant help you there, i'm a little out of date having never done the digital mixing thing, but i would not advise going down the vinyl route as that is old hat, with a lot of music only getting digital releases.