You will meet him as a ghost and will then start collecting his armor, which you will be able to keep and wear. So basically you are this knight after the quests.
No you can't play any elder scrolls on mac
Yes. It's DLC.
no
no
You can use DOSBox, Windows or Windows XP
Yes, you can download it as an .exe file on the Elder Scrolls website.
the games where you can play as a lizard man are Elder Scrolls 3: Morrowind and also Elder Scrolls IV: Oblivion. I don't know if there are any others, but there probably is more.
Elder Scrolls V: Skyrim
Yes
The Elder Scrolls V: Skyrim.
Elder Scrolls V: Skyrim
No, you do not.