Automated email after event registration
You can use Scheduled Reminders (Administer>Communication>Scheduled Reminders) to automatically send an email based on an event type, or even event name.

Alternatively you can use the CiviRules extension(extension found here: https://civicrm.org/extensions/civirules and documenation here: https://docs.civicrm.org/civirules/en/latest/) to do achieve this.