Constant Beep, All lights turned on, lost part cold air etc

*2005 prius*

Please help. i’m about to move out of state next week and i will be driving there!

disclaimer. So I haven’t added any oil since my last oil change, i think about 600 miles ago.

i experienced a whole lot of issues all at once. my cars triangle light came on and the check engine light. the screen signified there was a problem on the display too. then as i was pulling into a parking lot, i lost part of my braking capability, it had a loud constant beep sound (same tone as the beep you get when you don’t put your seat belt on) and all the lights on the dash came on or most of them. i’m not sure if the periods between the constant beep and the breaks were consistent but it would randomly beep for about 30-60 secs and vice versa. when it beeps i notice the emergency parking brake light comes on and that’s when i experience the problems with the brakes. however when it’s not screaming at me, i have braking ability. on my way home, i was trying to drive very slow on the freeway and my car started to scream at me again but this time i lost the ability to accelerate... which meant i couldn’t hardly break or accelerate. i still have power steering but i noticed my AC wasn’t color either. i pulled over and shut the car off for 5 mins then started it back up and drove a mile to a parking lot and parked it. WHAT IS GOING ON WITH MY CAR?!