The basics (other then your usual growing supplies) would be....
Medium(s)
Net pots/buckets/other container
Air pumps/Air stones
Water reservoir
Water pumps..if you want automatic watering
Timers ^^
Pvc piping or other plastic tubing
Nutrients
Ph up/down
Ph meter
PPM...
Your first seed leaves should be an inch to two off the top of the soil. Keep your lights or light closer to seedlings to keep them from stretching. You can transplant and re-bury your seedling with some of the stock under the soil if you have to.
Re: amount of fingers???
The only thing that your leaves should tell you is what strain of cannabis the plant is dominated by.
Long skinny fingers. lot's of them 5-13 - Sativa
Shorter, fatter fingers. less of them 5-9 - Indica