If the atmosphere on mars was able to sustain life, then yes you would be able to eat there, assuming you had some food.
you have to eat your own feces
There are no people on Mars, and no astronauts have visited Mars. The Moon, yes, Mars, no.
Not that we know of
Eat food
you would get to mars by buying a spaceship and hiring someone to fly you to mars.
You eat the tomato seed :P
i would take an astranant to mars
Presumably the same things we include on earth, a place to sleep, eat, and shower, at the minimum.
eat alian from mars
You can eat almost anything you want in this world, even mars bars, as long as you don't eat too many of them.
Mars has no forms of food unless you eat dirt, sand, and rocks.