Meguiars new car kit has everything you need to get started..
You need a pH balanced wax safe shampoo like turtle ice, meguiars, dc, chemical guys, there are a ton of great products out there and in the end it boils down to personal preference. I like meguiars because i think it is real bang for the buck.
Then you need a couple of microfiber towels. These are all youll use to touch your car. Buy atleast 5 or 6.. IMO the more the better.
You also need a good jar of wax thats non abrasive...
Start off by washing and waxing weekly and slowly move towards more stuff like dressing tires, interior, engine bay, etc.