What ia good Dj system for a beggining dj?

Im 15 and i like to be a Dj. This summer im getting a job to have enough money to buy turntables and all the accesories. I liked these turntables i saw in Guitar Center and its called Mixed Deck but i dont know if i can get it because it cost $700 and idont know if i would be able to get enough money to buy it.. Can anybody suggest something for me? Thanks