For an inside grow you will want a power bar, tent, light, timers, exhaust fan, filter for exhaust fan, a couple of circulating fans and a combo thermometer and humidity gage. In my mind this would be the minimum equipment for an inside grow.
Next is what medium you're going to grow in. Hydro. Coco, Organic, Soil?
Nutrients?
Make sure your tent has plenty of height! 6 feet is a suggested minimum. You will be surprised how tall your plants can get.
I see a lot of people using multi part fertilizer with a lot of problems. I recommend GH maxigrow and maxibloom to start out. You can grow beautiful plants with those 2 and nothing else.
What type of plants, auto or photo? I recommend photo's to start. Autos sound good but there is little margin for error. A cheap 10 dollar timer is all you need to flower photo's.
Where do you get seeds? I like NASC, they have a good selection, quick shipping and their freebies are usually top notch. There are plenty of reputable seed banks you can get some good recommendations on this site.
For an outside grow seek help elsewhere I suck at outside grows and have given up trying.