Bus from Mexico City
It a 3 hour bus ride from Mexico City to Taxco. The bus from the Mexico City airport will only take you 1/2 way to Cuernavaca. You need to take a cab or metro to the South Bus Terminal (Tasquena) to catch the bus directly to Taxco. They leave about every hour and there is food vendors in the bus terminal as well as great tacos at the taco stands across the street in the market!
If you are renting a car in D.F. and plan to drive to Taxco, I highly recommend getting the smallest car possible.
The roads in Taxco are crazy to say the least, in act I would even say that after the initial Spanish incursion, the layout of the city wasn’t to important. It is hard to believe that the city itself even exists due to the harsh terrain, the streets are super narrow and you are going in one of two directions, up or down hill.
In the city it is best that you walk, but the steepness of the hills will put an end to that almost immediately. Be careful I would even go as far to say that driving there is as big of a change as driving in Europe if you are from the Americas.
getting to Grutas
Not sure if the Grutas should be on the Cuernavaca pages or this one (I think they are in the State of Morelos - so Cuernavaca but as they are easier to get to from Taxco, I'll put them here).
The Grutas really are spectacular and worth the 45 minute bus ride from the Flecha Roja bus station (same one as buses to and from Cuernavaca & Mexico City) in Taxco.
Taxco (in the state of Guerrero but on the northern border of State of Morelos) is about 90 minutes from Cuernavaca. Motorway for more than half of the journey, as the bus starts to ascend the hills, so the scenery becomes spectacular. The journey from mexico City is about 3 hours and, by-passing Cuernavaca, takes the same route.
If you ask the guy at the bus station for a map (he sits at the far end by the ticket sales counter), he will encourage you to go to the Reconstructed Silver Mine - for free. And its true. He'll hail a cab, give the driver a token, and off you go. Whilst the silver mine is absolutely not worth any time at all (a 2 minute guided tour in the back corridor of the large shop), the shop is worth checking out to compare prices (and they stand up pretty well for what they have). And the drive will give you some idea of the layout of Taxco (which inspite of being relatively small, is spread out).
There really is a myriad of Black & White Beetles that beetle around the city. Every which way you turn - which is great, and, whatsmore, they have a flat rate of 15 pesos anywhere in the confines of the city. Luxury travel it ain't, but at 15 pesos...Only take 2 people at a time - the front passenger seat has been removed.