We backup all of our servers daily to several off-site locations around the world. You cannot generally request data from these backups as they're intended to restore the entire server to an earlier state and not just your user area. You can request specific data for a small fee, but this is dependant on the nature of the request and the specifics of the data in question.
Of course you can! Our control panel has a built-in backup feature which allows you to keep a predefined number of backups (this depends on your package). You should download these backups to an alternate location to ensure a much greater level of data redundency.