Newbie advice on lenses for Samsung NX210

[rpvconsult]

I'm new to interchangeable lenses and currently have a Samsung NX210.
There are currently no telephoto lenses >200mm for this camera. Do I have the option of buying an adapter and using say a Canon or Nikon lens
for this camera? Also, what are the pros/cons of doing this (especially
regarding optical image stabilization, auto focus etc.)

Thanks in advance!

[rpvconsult]

Specifically, my questions are:

1. Will image stabilization work with a non-Samsung lens?
2. Will AF work (I am assuming this is a no but just to confirm)
3. Are there any other disadvantages to using a non Samsung lens
4. What would be the most cost effective way of doing this...ie
what adapters and say 300mm lenses are reasonably priced?

Thanks again