When registering you will be paying for your entire team. You will be instructed to create a team while registering. You will be given the option to create a Team Code. If you create a Team Code, you will need share this with your Team Members to allow them to register for your team. If you do not create a Team Code, anyone will be able to join your team.
You will be registering for free. You will be instructed to choose a team while registering. You will need to reach out to the Team Captain if the team you wish to join requires a Team Code.