What took the Mars rovers to Mars?

Answer 1

There have been 5 rovers sent to Mars:

Mars 2 Prop-M rover was launched by a Proton K Rocket and carried by the orbiter.

Mars 3 Prop-M rover was launched by a Tyazheliy Sputnik Rocket and carried by the orbiter.

Sojourner rover was launched by a Delta II rocket and carried by the Pathfinder Orbiter

Spirit Rover was launched by a Delta II rocket and carried by its orbiter.

Opportunity was launched by a Delta II rocket and carried by its orbiter.