Here's a guess:
The "black" is actually a 1:1 mix of Chaos Black and Codex Grey. Wash with Badab Black. Edge highlight with 1:2 mix of Choas Black and Codex Grey.
Lights are probably orange nasecoat, highlighted Yellow, then white.
"Gold" is probably a basecoat of Scorched brown and Shining Gold. Wash with Gryphonne Sepia. Highlight with Shining Gold, then edge highlight with Shining Gold and Mithril Silver.