1996 Audi A6 Failed emissions echeck for engine light on

Computer problem
1996 Audi A6 6 cyl All Wheel Drive Automatic 140k miles

Just bought this car, runs fine, no problem. Just as I was pulling into Ohio echeck station for emissions inspection, the engine light came on. They said it passed catalytic converter, Pressure of gas cap, MIL engine off.

However, it failed on MIL Engine on, TR number 3, with 3 DTC codes:
P0301 Cylinder 1 misfire detected
P0302 Cylinder 2 misfire detected
P0300 Random/Multiple cylinder misfire detected.

What exactly does this mean, and how soon it needs to be fixed.

Thanks.