User blog comment:TGTBATGUnknown/TGTBATG's mod/@comment-216.232.195.113-20150113030849

I can't answer all of your questions, but I can give you a few suggestions:

3:. You say it's the capital of the Golden mountain, so "(insert exotic-sounding nonsense here), the Golden City" seems appropriate.

5. I can think of a few names for Hell: Gehenna, Hades, Stygia, and the Underworld.