there's plenty of places to get tables and mixers online for pretty descent prices. You could try prosound, or 123dj, or even musicians friend if you want (these are all american mailorders im pretty sure). If you don't have too much money and think you'll only be doing it for pleasure or whatever start off with a cheaper DIRECT drive turntables (from stanton or numark or gemeni). If your going to be mixing don't get belt drivin ones they are horrible and won't keep a steady beat after a few months or so of use. I started off with the stanton str8 80s and they were a good beginer turntable for me, they had strong motors, the tone arm didnt' skip around the record much, and mine still keep a pretty steady rotation (the pitch doesn't change and fuck up your mix after you've found the perfect speed to match the two records at).
As for how to mix just be patient and learn to do it all yourself, it'll give you your own style and make you stand out more from all the copycat djs. It doesn't hurt listening to the ones with some real talent like Zinc, Friction, Andy C, Mampi Swift, Hype, Futurebound, Dieselboy (who all have the intense technical skills) to Bailey, Bukem, Randall, and Marcus Intalex (who know how to put together a diverse yet well transitioning set and mix things out long and smooth) to get ideas from them. Basic rules of thumb for mixing though are to match the beats try just using the pitch adjust and not touching the record/platter at all. Start off mixing with simple beats (not crazy amen/apache cut ups) and listen for the snares on the second and fourth beat of the 4 beat measure. Theres more i'd like to tell/show you but i can't do it with just words. Haha oh yeah don't be a pussy and do the thing where you mix the two songs together where its the part where there aren't any beats (like a breakdown before the drop) and just cut it over real quick when the song your mixing in drops. That's cheating, all the real heads know that you aren't shit if you do that and you wont get any better at beatmatching if you just do that. Good luck, and develop your own style and play what you like not all the crowd pleasers (but don't think you can't play the crowd pleasers that you also happen to like).