You can't directly import from Capture One into Lightroom.
You have to first save as a TIF or JPG from Capture One. If you perform the save in such a manner that the keywords are included in the saved file, then yes Lightroom will recognize them.
Does that also go for metadata?
I can't give exact specific details, since both Lightroom and Capture One might use slightly different conventions to store different metadata (you'd like to think something like this would be standardized, but NOOOOO sometimes software manufacturers do it they're own non-standard way).
So the only way to find out for sure if certain metadata will transfer is to try a test.
Thanks, DJ. That makes sense.