Swiss bank account. Obviously.
Then, we'd start with the Ferrari 360 Modena. I'd also get a Mercedes Benz G55 AMG for the Colorado house, as well as the Brazil/Hawaii house. I'd probably have an M3 for my daily driver at my NYC house.
I'd buy myself a really nice road bike, probably a Merlin. I'd get a nice mountain bike, as well. I'd have a pent house apartment in New York (Central Park). I'd have a beach house in Maine (BMW 330xi) (gotta stick to the roots). I'd have a surf house in Brazil or Hawaii. I'd probably have a ski condo in Colorado. I'd bike here, as well. I'd probably have an Italian villa somewhere on the Mediterranean coast, or maybe a house somewhere along the Costa del Sol. The Ferrari would probably stay in Europe. The Mediterranean coastal house would have it's own yacht for cruising of the seas. Of course, the Manhattan pad would be my business base. My private jet (Embraer?) or helicopter would shuttle me domestically, I'd ride British Airways Club World to Europe.
Of course, before I bought anything, I'd put 500 million in the bank/invested so I could live off the interest and pay housekeepers for the various houses.
I'd buy/build my parents a house, and offer them cash. They would be more than welcome at any of my various pads at any time. If I was not present, the housekeepers would take care of them, as well as my houses. Same goes for my brother and sister.
After this year or two of constant travel and motion to various houses, I'd probably settle down in Northern California in the Napa Valley with a nice mountain house, a beautiful European wife whom I loved, and plenty of happiness.