No, because time is a function of the Universe and is subject to mass, location, velocity and other physical phenomena. Time began with the Universe and when the Universe as we know it ends (and it will end since it had a beginning) time will cease.
At the speed of light, it takes millions of years. For example, the Andromeda galaxy, which is the closest galaxy to our Milky Way galaxy, is about 2.5 million light years away, that is, traveling at light speed it would take 2.5 million years to get there.
they would think we are strangers
Observing another spiral galaxy, gives us a good idea about the structure of our own Galaxy.
No -you die from old age. The nearest galaxy is the Andromeda Galaxy and it's 2.2 million light years away - meaning if that man in a probe was traveling at the speed of light (currently impossible) it would take him 2.2 million years to get there. As you know, humans only live about 80 years.
You could send them in the right direction but they would never make it. Even if they traveled at the speed of light, it would take 2.2 million years to get to the nearest galaxy - The Andromeda Galaxy
It is possible to discover new galaxies.
They cant protect themselves, it would be very difficult to travel from one place to another.
To go to it. ;)
Each star is a sun for another galaxy, so i would say it was absolutley massive!
This: http://www.haydenplanetarium.org/resources/ava/galaxies/G0601andmilwy
I see that you are not from this galaxy. I would like to direct you to the next galaxy. I would like for you to name the galaxy in which our solar system resides.
That would be the Milky Way Galaxy.