The Co2 is usually the icing on the cake so to speak and with the info you have given me we don't even need to be talking Co2 right now. You can grow perfectly fine without Co2.
First thing you need to research on the site is CFLs. (compact Flourescent lights)
Second thing you need to research is soil growing techniques.(hydro is not for you yet)
Third thing you need to research is Nutrients.(Don't burn your babies)
Fourth thing is to prepare a suitable grow box....
Do a search on the site and all the info is here. If you have any questions after you do some research come back and we can help you out.
Take care- Jay