Ok that's helpful.
For your body I would recommend either a 5D Mark II or a 7D. The 7D is cheaper, but it does not do as well in low light conditions. The differing sensor sizes will also impact your lens selection. I would go straight for the 5D if you want to shoot indoor/night events.
Personally - and I know others will strongly disagree - I would just start out with primes for video. On the 5D the 35 2.0 and 50 1.4 will work nicely and only set you back about $700 for the pair. You'll get great low light performance and two very workable focal lengths.
So far we're at about $2400 for a body and two primes.
You'll need a microphone. Pretty much all the fancy stuff is out of your price range, so I would go with a Rode Videomic Pro ($230). The 35 and 50 primes will require that talent stand relatively close to the camera anyway so sound should be passable.
$2730 subtotal.
Time for a tripod. I love manfrotto stuff but I recently just tried a Benro S4 kit that kind of blew me away for what it is - I'm picking one up to make it my go-to event tripod. $275 for the head and legs.
$3005 subtotal.
Extra cards and batteries. Plan on about 10 minutes for every 4 gigs. A good 32 gig CF card will cost you about $100, and will hold roughly 90 mins of video. Spare battery is $60.
$3165 subtotal.
Now, I use adobe premiere and I can't really say anything for final cut. Premiere costs $700 to purchase outright. Luckily, you can subscribe and use it on a monthly basis - $30/month. I would recommend doing that until (and if) you're able to swing the full license. Luckily you get a 30 day free trial to get you started.
So that will get you nicely started, slightly under budget at roughly $3200.
If you wanted to go the full $3500, I would pick up an external audio recorder like the Zoom H4n ($225). But your audio needs may not require it and it may be more of a post production headache than you're willing to deal with at this point. If that's the case, I'd recommend a monopod - manfrotto makes a nice one - that would be very handy to have in cramped event conditions.
hopefully someone else will chime in with their thoughts too.
joe