Yes. Mars has been known since ancient times, long before the telescope was invented.
Without a telescope you probably couldn't see earth's moon from Mars.
Yes, Mars can be seen at night without a telescope. It's a "naked eye object".
yes
You can see Mars without a telescope when it is visible in the night sky and relatively close to Earth during its opposition, which occurs approximately every two years. Mars is typically visible to the naked eye as a bright reddish-orange object in the sky during these times.
Yes, if it is 'up'. It looks like a red-orange star.
Yes.
Yes, through a telescope
You can see Earth, Mars, the Moon and galaxies!
Mars
Yes, one can see Mercury even without a telescope.
Yes. It can also be seen without one.
Yes, the planet Mars is visible to the naked eye.