Everyone makes a great point here.
So now all you have to do is figure out what do you want to concentrate on the most at first. You can always upgrade afterwards to compensate for what you don't have.
If you want to start out concentrating on just Directing actors, and won't be concentrating on lighting. Start researching IndieBudget's perspective. Get a cheap Hard Drive HD camera. A good sound kit: Boom pole, headphones, mic. and wireless. Start working with small scripts and work your way up.
By the time school ends you may be ready to get your next camera or already know a guy that is more interested in Cinematography. He might already be getting a large kit and can help shoot a lot of your projects...
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But if you want to start out concentrating on composition, lighting, and movement. Then I'd say go the DSLR route. Invest in lens and cheap gorilla lighting techniques.
*** If you dig racking focus then getting the above kit is not for you… getting a DSLR will be****
When I started out I wanted nothing to do with talking to actors and sound on set

so I shot silent shorts.
I started outside (learning Depth of field, camera placement, and movement) at first. Then I graduated to the inside to learn lighting, color and re-learn everything else.
So here is the short version… Do you want to direct or be a DP by the end of film school…Once you know that then pick which tool you want to learn.