Getting to Cuernavaca is quite simple, as it is located only about an hour’s drive from Mexico City on a fast toll road. So you can fly to Mexico City and then rent a car or catch a first class Pullman Line bus which goes between the Mexico City International Airport and central Cuernavaca. It takes under two hours and costs somewhere under $10 U.S.
Within Cuernavaca itself, you can walk to many of the sights. There are plenty of taxis, and there are also tours to spots of interest in the surrounding area.
This is the shortest travel page I’ve written on this site. It’s all quite simple!