Hmm...yes Matthias was correct with the first part.
As for the second. There is no official canon ruling as to Tulak Hord's race, so most assume since he was an ancient Sith Lord he was of the Sith race. However, from the wookieepedia page:
|Updated continuity information from The New Essential Chronology has now refined Hord's historical lifespan—he lived at some point after the Hundred-Year Darkness and Dark Jedi exile from the Galactic Republic (around 6,900 BBY), until an undefined time prior to the Great Hyperspace War (c. 5,000 BBY).|
This would mean during the times Tulak Hord was alive, the Dark Jedi were reigning over the ancient Sith people of Ziost and were interbreeding with them through the use of Sith Alchemy. So, there are two possibilities, one Tulak Hord is human or two Tulak Hord is a mixed breed of Sith and Human. So for your character I would suggest saying your character is human because by now the traces of the Sith race in his blood (if indeed Tulak Hord was a mixed breed) would be so diluted it would practically be non-existent.
However, you may say that you're family has a marked family tree dating back to Tulak Hord and you are indeed a descendent (albeit very distant descendent) of Hord's.
I hope that helps, and welcome to the site.