everything quit all at once while driving?

Hi, I was driving the other day and the brakes locked up and the power steering went out at the same time while I was going around a corner. I pulled over, parked, and shut off the car. When i turned it back on the battery light was on. I went around the block and parked it at home. I have been experiencing other nuisances my car will tell me I am low on anti-freeze when I am not. It will overheat while I have plenty in the radiator and in the reservoir. I want to fix it. It's a really good car. How much am I looking at to fix my car?