You will need either a Swarm of bees (collecting from the wild), Package of bees (bought from a beekeeper), buy an established hive, buy a Nucleus hive (from a beekeeper).
It is unlikely anyone will sell you a queen bee if you do not have established bees. Thats like putting a woman on a desert island and asking her to create a city of people.
If you are keen to learn about bees and how to manage them, I would suggest looking into a bee club in your local area. They have classes, workshops and field days. This is the best way to start.