If you're wanting to produce something close to pro or filmic footage. You'll need a decent camera that'll cost you $4000 and up depending on the camcorder and the extras you'll need with it, like tripod, lights, mic, etc. A camcorder that shoots with progressive scanning (24p, 30p) I find to be preferrable.
Macintosh has always been the leader simply because they are literallly there own systems integrator, and you feel it in the pocket book, too. To find a good computer, whether it be a Mac or PC, you need to find out what program you intend to edit with and see if the program company has certified any particular models with their software. If they don't, then just get something with the most powerful processor, RAM, and hard disc space that you can afford.
I personally don't fool with anything but Avid for PC, which comes in several different flavors and price ranges. If you can afford a good camcorder and computer, but that leaves you spent, Avid Free DV is quite impressive for a free application and comes with a slew of free downloadable video tutorials from Avid's website (which are mostly applicable to Avid's higher end apps as well, except for Liquid).
Not that I'm promoting any questionable means of getting your projects off the ground, I will say that "aplusjimages" has a point, so depending on your scruples, your decision on whether to go with a mac or PC may be an easy decision since more software is readily available for the PC.
If you're able to network with others who have the same passion, you may find someone who has gear you can practice with while you save up for your own. Or you may find someone or several people you can partner with to contribute all the necessary gear to see a project through to completion. (Just never let your stuff out of your sight though!).
It all really comes down to what your resources really are, or what you can afford. The best budget way to break into the game is with a new progressive scan HD camcorder, shotgun microphone, quality tripod (not from Walmart), PC with Intel core 2 duo 2.0 or faster, 2 or more Hard Disc Drives where one can be dedicated to AV only unless they're setup as a RAID, and anything from adobe premeire, sony vegas, to Avid software.
Checkout ebay, never know what you may luck in to.