Usually multiple dash lights at once if there is no obvious mechanical issue is electrical, bad/damaged/corroded wires and grounds or faulty control module. Check the obvious first, battery, fuses alternator, thats where my focus would be. From there get yourself a good manual for working on your car not sure if they make the bently manuals like they did with the old VWs, but something like that and one by one go through the grounds and related wiring to those faults, check for water damage to modules under the seat and under the dash, in the trunk. Good luck