If you're shooting outdoors, the lights you'd be able to afford are probably going to have nowhere near enough power to do anything against sunlight (and you wouldn't be able to get power to them easily), anyway.
However, look in to getting a 5-in-1 reflector - you'll get far more use from that outdoors on your budget, and they're really cheap. If you don't have someone to hold it, maybe get a stand and some sandbags (but that will add to your costs).
For indoor shots, you could look into DIY options and/or worklights. Both are far from ideal solutions, but you can learn about some pretty basic lighting principles using them, and they're very cheap. Be wary of how hot they get. Try to shoot in daylight hours, so you can use windows as a fill light.
You can do that for under $100.
I don't know your style, but I'd probably go for a tripod over a flycam. The flycam's are shoddy build quality at best (I know, I own one) and are quite limited in use. If you're creative, you can get some really nice shots with a tripod. pull one leg in, and tilt it to mimic a jib type shot. Pull the head back, chuck the legs on your shoulder, and you have a shoulder rig. Find the "middle" of the tripod, and hold it there, and you have a (very poor) steady cam. Etc.
As others have said, I'd get something a little wider, faster, and of fixed aperture for a second lens. Most people will tell that the 18-55 sucks. It does. But don't rush out to replace it, it's got a useful focal length range. I've seen some people get some impressive shots on it. I'd get something around 30mm as your "main" lens, then the 18-55 can cover the other focal lengths you might use.
I'm not sure if you really need filters at this point. A UV filter might be useful, but personally I barely use any of my filters (other people differ, of course).
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Sound. As others have said, this is a big area. If you're planning on shooting dialogue, it will be the biggest downfall of your film. If not, you better get a pretty good sound designer to help you in post.
However, contrary to their advice, it may not be a great decision to rush out and buy right away. It's hard enough learning all the visual stuff, as well as learning proper sound technique (note: you'll not be able to do both, and you won't be able to learn either very well). Try hook up with some local, new person who has an interest in sound. They may have their own gear. If not, come and do a search here - there are lots of threads about it. It may be a wiser decision to rent. You want to budget at least as much as you've spent on your camera and lenses etc for sound.
