I wouldn't buy a kit. Read a little bit about getting started and get the basics. Kits include alot of stuff, that I have chosen not to use. I buy KD boxes and frames and assemble them. I've never tried the polystyrene equpment, but some people in colder climates swear by them. I usually weigh down my hives with some bricks or blocks, and the bees glue everything together.
You need to make a few decisions. What size equipment to use. Full deeps are very heavy, but with mediums you need more equipment. What will be your goal in keeping bees. Will you extract, cut comb, or make sections? What will be your approach for pest and disease management. There are many choices in this area and not all of them work all the time. How much gear will you need? Eventually, your going to get stung. Some people wear full body armor, and depending on the route you take, you can spend a good portion of your clothing allowance on a bee suit. All these things and many more need some thought.
The days of putting a colony or 2 of bees in the back yard and forgetting about them are long gone