read a tutorial on growing first but heres some things that may help
to start get a 4 foot t8 shoplight with 6500k bulbs "$15 at home depot". some potting soil "$5". 16 oz plastic cups to start them in $2? just cut some holes in bottom for drainage and use pieces of paper towels at the bottom. get a fan to circulate air in the growroom $10.
now you can start seedlings and keep them alive for a couple weeks but to get them past seedling and through vegetative stage it will take more cash for more lights, soil, bigger pots, nutes, ph adjustment kit
to flower you will need 3000k lights, different nutes, a timer and the room must be completely dark for 12 hours every day.