We do not know. Scientists are currently devoting a lot of time to the study of planets in other star systems that fall into the "Goldilocks Zone": Not too hot, not too cold (Earth is a perfect example of a planet in the Goldilocks Zone). The odds are very good there are other planets out there similar to earth. That does not imply they'd have life on them, but they could. It is anyone's guess how long it will be before we know - if we ever do.
Maybe, but not in this Solar System
No, There isn't any life on the other planets.
Yes, all the organisms on our planet, Earth
There are no people on Pluto, or on any other object in our solar system except Earth.
It is highly unlikely that any other planet in our solar system will. That does not preclude the possibility of life being elsewhere in the universe.
The solar system is not part of any other star system. It is part of a galaxy called Milky Way.
Not entirely sure what you mean with "living planet"; there is no known life on Mercury, or on any other planet on our Solar System for that matter, except on Earth of course.
There are no galaxies in our, or any other, solar system. They are far too large.
Saturn has more moons than any other planet in our solar system
The sun is the only star in our solar system.
None in the solar system itself, but over 500 trillion in the rest of the universe.
Yes, us. There aren't any other people in it, but the people on Earth are all in our solar system.