The only space mitions on Mars that i know of would be the 2 Mars Rovers still currently exploring Mars.~2010
We have sent rovers to Mars but there have been no manned missions.
yes
Spirit and Opportunity are two.
Mars has been in space for as long as any other planet, such as, earth.
No, we are working on getting to Mars. Pluto is several trillions of miles away
Yes, there are 44 missions.
Nope, not yet and there are no plans for any to visit in the future.
Quite a few; all robots. Some are still sending messages back.
As of yet, no. This search has been re-directed to within our own solar system (SETI has been shut down, I read), and centers largely on Mars, where the question is: "Did life ever exist on Mars?" This will be the motivating force behind several upcoming or planned Mars robot missions.
Many have been sent, although only around a third of missions actually got there. However, the number that were sent is around 42, with several planned by various agencies for 2010-2011 and beyond.16 probes have gone to Mars.
The first person to step on Mars has not happened yet. As of now, no humans have set foot on Mars. However, there are plans for future manned missions to the planet by NASA and other space agencies, and it is possible that the first person to step on Mars could be an astronaut from one of these missions.
No. The only manned space missions have been to the Moon.