multiple dash lights coming on

Bought the car in October 2014. No problems until Feb 2015 when the cruise light began flashing, and check engine light and anti lock brake light came on . I had it repaired - was told it was a sensor and something about oil fuel mix, and four months later the lights were back on . Had it repaired again and soon they were on again. They have been going on and off on their own ever since every few weeks. No one seems to know what the problem is and I am very tired of dealing with it!