There are great resources and books on indoor growing. That said, these are basically what you will need:
A container/box/tent for growing in. This should be lined with a reflective material. Mylar is great, but flat white paint can work fine, if kept clean. The unit should have an area cut out for air intake near the bottom with a screen, at least one. There should be a second 'outtake' area near the top where you can hook up an inline fan. You need a constant exchange of air to keep co2 levels up... Optimally, you want a fan that can remove the air in the box, completely, at least once per minute. If you have a small space, like 63 cubic feet (a 3x3x7 cabinet, let's say) then you want an inline fan which is rated at least 63cfm (cubic feet per minute), or more. I went higher, to ensure air exchange..(425cfm) for the same dimensions.. Hook the extraction fan to a carbon filter, if odor is an issue, and on the outtake side, you can use ventilation hosing. Seal up all connections to ensure maximum performance.
Next, you need lighting that can be adjusted in the cabinet regularly. A simple wire or chain suspended light is fine. Lighting can be tricky to explain, because some very high wattage lights have low lumen output, and even if the lumens are high, the spectrum needed for plant growth may be minimal. In general, look for a light that has high levels in the blue (400-490nm) and red (600-700nm) spectrum. HIDs are often used, but can get real hot in small spaces. One can use 'soft white' 2700k and 'daylight' 5000-6500k cfls together to maximize the red and blue. For stealth growing, a well made LED can be great, but the good ones are pricey. Again, lighting can be tricky, but the better LEDs have a great PAR (photosynthetic active radiation) output. For the veg cycle, the plant will use more of the blue spectrum, for the flowering, more of the red. Most experts will recommend at least 5000 lumens per square foot for fast growing plants. Most pro growers use way more. Keep in mind that the lumens decrease greatly the further the light must travel. The inverse square law shows that if the same light is placed 2 feet away, as opposed to one foot way, it will produce one quarter the lumens. Three feet away, it is one-ninth the intensity (lumens per square foot). So keep the lights as close as you can, but don't burn your plants!
Pots should be picked to allow the root mass to stretch down, as cannabis roots like to grow deep. ALWAYS make sure you have drainage holes. A 2 gallon pot should be plenty sufficient for a smaller indica strain, like NL. Always transplant before you start flowering, as the stress can screw up your flowers.
I would use a soiless mix for indoor cultivation, maybe augmented with some worm castings and extra perlite. Its easy to put together your own. I use coco, shagnum, turface (a hard baked calcinated-clay in 'pebble' form), in about equal proportions, then add some organic content like worm castings, bone, blood, and feather meal (generally no more than 10% of total mass, but that's me). Epsoma makes some good formulas with a bit of all of this stuff. Pick one that has roughly equal parts NPK to avoid nutrient disorders. I then add perlite till I'm satisfied with the 'airy-ness' of the mix (maybe 10-20%, depending on the consistency of your grow mix). The soil should be well draining but retentive. I use the turface stuff because it holds aprox. equal parts water and air.... Its used in bonsai cultivation a lot. Look on ebay.
I would invest in some hydroponic quality nutrients, (esp. since you won't have to use that much with a small grow) but whatever you pick, make sure you're getting the big six in your watering regularly (N,P,K, and Ca, Mg and Sulphur). A formula that has the micro- nutrients is also important... many 'complete' formulas have all of them. If you are unfamiliar with mixing nutrients, a higher quality 'complete' formula like flora-nova can be used, just make sure you have them for veg and for flowering.
Lastly, use decently rated cords and power-strips. Plug the lights into an appliance timer (makes it sooo much easier, and they are cheap) and, in addition to the inline fan, use a small fan inside the cabinet, just to help with circulation.
I think that covers the bare basics, but if I missed anything, my apologies. Do your homework. Also, for the 'auto-flowering' variety, I would stick with 24/0 or with 18/6 rather than both. I personally like 18/6 as the roots do things while its dark that they don't do during daytime growth (though what exactly, I can't remember). It would also be easier on your electric bill and equipment.
Good luck. Planning the set-up and executing it can be as fun as the grow itself, in my experience....
