Wow, like everyone else said there are too many options and your budget is not big at all, but I'll give it a shot.
First off you need a light, so do some research and get the light that best fits your budget, probably a 250w-400w, maybe 600w if you can get it really cheap on Ebay. I got my 600w for $150 on Ebay, but its cheap and "Made in China" so if you buy a cheap one make sure you get backup bulbs because they will go out on you sometimes.
The hydro setup, I don't know alot about hydro but based on your limited budget I wound do some type of DIY setup and build your own buckets or something.
Carbon filter and fan, now these can also be expensive and depending on the size of your tent you will need either a 4"-8" filter and fan combo, do research.
A/C cooling and ventilation, now this really depends on your setup, if you already have an A/C unit you can use duct work to bring in the cool air from the A/C, you can also get an air cooled hood for your light and run duct work thru your light and out the tent. Fans, your gonna need at least 1 oscillating fan, probably a 5"-10" fan would be good depending on the size of your ten, again do research to see what options best fit your setup.
Those are the main options and there is still more stuff but I'm not gonna get into all of it, just do research and find what you need. good luck.