1. By default, the registration is the same for both types of users with the exception of selecting which "type" they are. We do have a tutorial available on how to customize the registration form which you can
read here.
2. Technically it could be done, but this would require customization of the default theme on your part as there is no setting for this in the JobRoller admin dashboard.
3. Not that we are aware of at this time. Thanks.