Gremlins under the hood?

ford
taurus

#1

a few weeks ago my hazard blinkers turned on by themselves while the car was parked not being driven. then later windshield wipers came on. now today, when we got into the car to come home from shopping the key in the ignition/or you left your car door open buzzer went on and would not turn off–all the way home. it’s obviously an electrical problem, but i’m wondering if it’s safe to drive? will this be an expensive repair?