Hiya Pete
@pfleety , congrats on joining up, you'll have a ball
You'll need all the DLC for all cars and tracks for any event you enter.
First though (to enter events) you'll need to go to your 'account', click on 'Personal Details', then near the foot of the page enter your real name - if you're not using your real name in events you'll get kicked off the server (it doesn't get picked up by search engines btw). There's a box under where you enter your real name that explains this. You'll also need to show your real name in TeamSpeak too
The other important stuff is in Craig's 1st post re the event rules, installing Teamspeak etc:
"Server and Teamspeak Password: click here (TEAMSPEAK IS MANDATORY)
Teamspeak Installation Guide: click here (Handy guide to setup teamspeak)
Tracks, Cars, Apps Installation Guide: click here (Handy guide to install non AC content)
Racing Club Rules: click here
Incident Reporting: click here"
Hope that helps, have fun