Yes, the surface of Mars is fairly solid; it is sturdy enough to support roving vehicles, for example.
No. Only a few man made robots/vehicles.
Three spacecraft that have explored Mars are the Mars rovers Spirit, Opportunity, and Curiosity. These robotic vehicles have conducted various experiments to study the Martian surface, geology, and atmosphere since landing on the planet.
Because we're skilled enough to build rockets that can go to mars and land a vehicle there w/o having people along.
The NASA Space Vehicle that have taken video on the planet Mars is called Curiosity, This vehicle has a primary mission of seeing if life is inhabitable on the Red Planet.
Paul V. Tartabini has written: 'Aerobraking characteristics for several potential manned Mars entry vehicles' -- subject(s): Space vehicles, Attitude control systems
Sojourner, which was the robotic Mars rover, landed on Mars in July of 1997. Sojourner explored Mars for approximately three months. This rover was equipped with cameras and solar panels.
Yes, electric energy from a battery can be used to power a motor, which can then convert the electric energy into mechanical energy to drive various mechanical systems on Mars, such as rovers or equipment. This is how electric vehicles and many other devices operate on Mars and Earth.
Yes, there are many such vehicles. Whether you want the passengers alive, fed, breathing, etc. is a different story.
Transport resources and materials, as well as prepare for expeditions to mars or beyond.
Yes. As far as is known, the only research vehicles presently operating on the Martian surface are those placed there by the US, and the US' space exploration program is the only one to have landed hardware on Mars so far.
Mark Carroll has written: 'Design of a compliant wheel for a miniature rover to be used on Mars' -- subject(s): Roving vehicles (Astronautics)