I started playing drums 5-6 years ago, and have been playing since.
To start, I would first make sure that you're absolutely sure that you want to start playing drums, as it requires a lot of commitment and a lot of money.
To find a good starter kit, I would look on eBay, Kijiji, or whatever your area has available. I got a 5-piece kit, with extra drums (enough for a 7 or 8-piece kit) plus stands and a few cymbals for $199. Not all kits will be this good of a steal, but you could get lucky. From there, I would recommend either lessons, or a beginners video or book. They'll teach you basic rudiments, but actual lessons will be helpful for more "hands-on" practice. Playing along to music is great way to find what style you like playing.
Basically, like ZachyDou said, you need a lot of dedication to the instrument.