Technics 1200 is the industry standard turntable, although there are some DJ oriented decks from the other DJ companies (Ventax, Numark). But a 1200, or something in that series is a safe bet, as it will run forever. I have 2 from the 1980's that run like new, and have never been serviced.
As far as a mixer, you need a DJ or "battle" style mixer so you can "work" the crossfader. When scratching, it's all about the coordination between your scratch hand on the vinyl, and "juggling" the crossfader, to hear / mute your scratch patterns. Getting 2 turntables gives you options of going back and forth between 2 records, and keeping a beat going while changing your scratch record. Watch some You Tube video for battle / scratch Djs, and you'll see their technique.
In additional to a turntable and a DJ mixer - you'll need a slipmat (to slide the vinyl on the platter) - a set of headphones - and a decent scratch needle. All can be found easily online in the "DJ" section of the big music websites.
Then you got to get yourself some DJ records, with breakbeats, tones, samples, acapellas, etc... to have some material to scratch. Most of the vinyl that scratch DJs use are specifically made for scratch DJs...not casual listening.
In the age of digital turntables...I give you credit for staying with vinyl! Good luck!