If the windows are rolled up on a newer vehicle can I still get harmful rays from the sun while in the vehicle.?

The safety glass used in the manufacture of windshields and car Windows prevents almost all UV radiation from reaching through the glass to the cars occupants. So no, you can't really get "harmful" rays through glass, though technically UV radiation is only harmfull if you spend too much time in the sun, and too little can result in a lack of Vitamin D which is also bad for your health.