There are a few ways to get people into your team, depending on whether you are paying for them or they are paying for themselves.
Add them while you are entering
At checkout, use the ADD ENTRY tabs across the top of the entry form to add up to 10 racers in one transaction. You pay for all of them, and their entries are linked to your team straight away.
Email Invite or Social Invite
Once your team is set up, you are taken to your My Team page. From there you can invite teammates by Email Invite or Social Invite.
These are invitations only, not entries. Your friends follow the link they receive and then buy their own tickets, joining your team as they do. If your team has a password, they will need it.
Purchase Entries
Also from your My Team page, Purchase Entries lets you buy new tickets for other people and assign them to your team. Use this if you have already set the team up and want to cover someone's entry afterwards.
Send to friend
If you bought several entries in one go and have not assigned them yet, Send to friend on your My Team page emails an unclaimed entry to someone so they can fill in their own details. There is nothing to pay, because the entry is already bought.