Bullitt180

So I've had my first GS for about a month now. I bought it from the original owner with 205,000 miles on it. Runs awesome, I'm completely in love. Well, about a week after getting it, the CEL came on. Immediately took it to Advance Auto Parts to have the codes pulled. It was throwing like 7 different codes. Most of the codes had to do with the ABS system. My ABS pump makes a lot of noise on first startup especially when cold outside and goes away after a couple of minutes. Also was throwing a yaw control code, and some sort of ventilation code where tightening the fuel cap normally is the issue. Not long after that, the VSC and VSC off lights came on. All three stayed on for about the last 3 weeks, then randomly all 3 went off and haven't come back on since. I never reset the ECU, they just went off. Has anyone else experienced this that can give me some insight as to what's going on with my new found love?