1) Intel HD graphcis is built into your CPU so it does not have any video outputs.
The motherbaord it connects to has video outputs and that completley depends on the model of the motherbaord what it does and does not have
2)It supports it, but is going to only be a very marginal increase for gaming, and none at all for anything else.
If this is for gaming you will be much better off getting an i3 or Pentium G4560 plus a GTX 1050ti.
Also that PSU is very weak and medicore at best, if you want to ever put a half decent graphcis card in it, you need a better quality unit with around 500w (watts does not equal quality, a 550w Seasonic/Super flower is 100x better then a 850w Apevia (or similar junk brand).