I got my first set up for £300 dude, it can be done...
Although as you improve you'll realise that you need to upgrade your shit as it's not cutting the mustard, and you won't be able to get fuck all second hand for your gear as it's not quality stuff so hold no value at all...
If you really can't scrape together more (I couldn't when I started) then just do a bit of shopping round. Most specialist DJ stores will have a full package for that amount, however they tend to keep their prices low by giving you a sub standard mixer that will be useless in a year...
You're not gonna get technics and a mixer and everything else for that kind of money, not even second hand (well, very unlikely anyway) so I'd reccomend a set of turntables such as like Numarks - they're nothing like as good as technics but much cheaper and good enough to learn on - Just make sure they are direct drive.
Mixers wise, I'd reccomend swapping the shit one the store will have in their package (Stay well clear of Behringer, Citronic, and I'd even not bother with Numark, Gemini or Kam as far as mixers are concerned) for something like a Vestax PMC 06 - they're really not that much more than the shit marques I've mentioned but will be sturdy as hell and last a looooong time.
With mixers, you'll see a lot of them have loads of features (effects, kill switches, filters etc) but cost very little, that's because the build quality and components used are very poor and that's why they wont last. You won't even need all of those features. Go for the quality brand with less features and save yourself having to buy a new mixer in a year when the shit kill switch gets stuck at "on" in a years time...