Hi George, welcome to AF.
There's alot of good painting info in the How-to's and FAQ's here. Tamiya Chrome yellow is probably pretty close to Fayance Gelb- but if you want an exact match, try CobraColors. They have the exact color, but you'll have to use an airbrush.
You will definately want to spray the chrome yellow over white primer. You can spray grey primer first (it's easier to correct flaws on the body with) and cover it with white, or just use white. Then just paint it with the chrome yellow.
Take a look at the FAQ's, and if you still have questions, feel free to ask.