Looks like you have a solid list there. I use CG VRP on tires and trim. But it doesn't last as long as many would want. But with two coats it looks great and lasts a little longer.
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It takes a bit to get the hang of using FK 425. I usually mist the face of the towel once, then mist the about half the hood once. I have been using a gallon on it for going on two years.
I use a dedicated chemical cleaning polish such as Blackfire Gloss Enhancing Polish or Wolfgang Paintwork Polish Enhancer. I apply both with a either a black or green Lake Country pad on my PC7424XP mainly using speed 4.
I agree with both Mike and Bobby. Definitely figure out what services you are looking to provide.
The list Bobby provided won't break the bank, and many of those products have more than one use.
I would use a trim product such as Car Pro DLux. It will restore the black look, leave the surface not slippery, and most importantly will protect for up to a year.