Bus & Minivan
It's now quite easy to reach Torotoro via public transportation. Trans Mixto, Sindicato Mixto Torotoro or Trans del Norte minivans (B$35, four to six hours in the dry season from May to September) depart Cochabamba throughout the day, when full, from the corner of Avs República and Mairana. They generally seat 11, so if you have a group you can rent the entire vehicle for around B$400. The front seat is most comfortable and has unobstructed views of the passing countryside. You might be in for a long wait, depending on the time of day and month of the year (show up at the office in Cochabamba around 7am to guarantee a quick departure). It can be a much longer trip or even impassable in the rainy season.
Minivans return to Cochabamba from near the plaza in Torotoro. Best to get a group together to shorten wait times.
The much slower bus (B$25) traveling between Cochabamba and Torotoro is much less recommended. There's one departure daily, but times vary depending on the day of the week.
Car & Motorcycle
The most comfortable, if pricey, terrestrial way to get to Torotoro is by 4WD, and El Mundo Verde Travel, Andes Xtremo and Bolivia Cultura, tour companies in Cochabamba, can arrange this. Villa Etelvina and Hotel El Molino in Torotoro can also provide transportation as part of a package for guests at their hostales.
You can also rent 4WDs in Cochabamba, but keep in mind there’s no place to buy petrol in Torotoro itself. The route there can be confusing; be sure to have a GPS device or good app (www.maps.me is recommended), as well as a good physical road map. Check on weather and road conditions in advance.
The only option to reach Sucre directly is with a new private 4WD service offered by the Oficina de Guiaventura, for a maximum of six people (B$1450). You have to reserve in advance.