im no expert but this is what i have to say...
first of all, im assuming that these are coming from seeds, and also that you are starting fresh. For the first month or two, you will want a bunch of CFLs. How many? Im not too sure. Maybe 8-12 per room. Keep them on a 24/7 schedule, then switch to an 18/6.
Once they get bigger, you will have to switch to HPS lights, and get them on a 12/12 cycle to engage the flowering period, after decent veg time with the CFLs. You will need 1 HPS per room, and multiple systems can be VERY expensive. Anywhere from 300w to 600w should do fine. You could even but solar blankets to reflect more light onto the plants. no matter what, NO TINFOIL.
Ventilation isnt too bad, as long as it works to ger rid of the odor. Get a good fan system for the plants. Also, you will need a PC fan to keep the HPS ballasts cool.
Depending on how much money you have, you might want to reconsider your room. I would stick with one room only, and focus on a good 10-30 plants. Anything more would require tons of attention, and even more money.
I hope that gives you some idea as to what you need, but im still a noob. I also grow outdoors and ive never grown hydro. However, i spend lots of time reading up on proper techniques and other threads. Wait for more advice before listening to me.