They'll be issued a ticket for failure to provide proof of insurance, driving an unregistered vehicle, and driving without a license. These can all be fixed in court but still come with about a $30 fine (for each offense). If the person cannot identify themselves for the ticket, they'll be taken to the police station and held until there's some means of identifying them can be found, and if they're uncooperative about identifying themselves, they'll be arrested for failure to identify, which is a criminal charge while all those other offenses are merely infractions. The whole time they're down at the police station, their car will be towed and they'll have to pay for towing and impound fees.
It is an infraction to not have your drivers license with you. You'll still need to identify yourself though (tell them your name, date of birth, address, etc so they're able to pull up your license). If you flatly refuse to identify yourself, that's a criminal charge which can result it multiple days in jail and a criminal record.