First car 2006 Phaeton W12, need your advice

Hello everyone, after years of waiting, it’s so far that I got the best car in the world and that’s even the first car of my own. Now I need insurance, the part to register and with the new Kenzeichen (600km) and then I was praying for your advice. 1. The car comes from Spain(has no German papers), I have to pay attention to the registration here? 2. For the insurance you ask for the new price of the car, can I get this from the Fz ID number, e.g. the VW? In the appendix the HU and to that I had a couple of questions: – Can I remove the 2 things after registration and collection (no more that is 600km) or can I not drive the car or(shrek) not register the things at all? – What exactly should “motor oil-humid” mean and correspond to how to eliminate them? I was happy about a quick feedback so that I(hopefully) can pick up the car at home after Saturday: I live in Munich.