Hi,
Your question is way too wide open to even begin to answer it but I'll try to point you in the right direction... This hobby can run from a few hundred to thousands of dollars but more often than not, come harvest time you get what you pay for. If you look around there are lots of 'Sticky' posts on the main page that you can read and learn all about doing this. Check this 'Sticky' out first, it's titled "Growing Resources - Go here first before asking your questions.":
change the XX to tt and copy and paste this web address into your browser...
hXXp://www.marijuanapassion.com/forum/showthread.php?t=9396
Everyone here will go out of their way to help you but there are way too many ways to grow weed to begin to know what kind of info you're after. To grow the dank bud that is top dollar will require a substantial investment... seeds are a small expense in the overall picture. You can get some very decent seeds for as little as $30 for a 10 pack to hundreds for a 10 pack.
I suggest reading many of the stickies to learn more about indoor growing and use the 'SEARCH' function to help you check into specific questions you have and to develop a sense of the type of grow and if you can afford to proceed. Once you get a little knowledge it will be much easier to ask for details about what you're thinking for a setup and how to grow.
Good Luck!