I'm a newbie with cars (currently getting my driver's licence), but my parents will get me a Maserati for my 18th soon. So I have a couple of questions:
1. What's the difference between manual shift and automatic?
2. Which engine should I get (something universal)?
3. Should I get the car second hand or new, so I can configure it to my needs?
4. What tyres should I get? I heard the Dunlop XP Sport that come with it are not good for high speed turns when it's raining? I heard that pros can gain up to 0.4 seconds per lap with the Continental Vmax Integral in rain."
This is not to make fun of you or something, but this is what your query sounds like to most people in here. In all the answers, you could already read some points, all true.
I just picked the example above to illustrate you that "more expensive" won't give you "better" or well "better for your needs":
A D800 is a very nice camera, indeed, but "nice" depends on what you want to do with it as much as a Maserati might be a "nice" car for you. If you want to use it to drive your friends and/or family around and be able to load your drumset to take it to a venue, it's not exactly first choice. Same with cameras: Keep in mind that the lighter a camera is, the more likely you'll take it with you as much as possible. 300 grams make a *huge* difference when you have to carry it all day. Cameras like the D3200 or (soon) D5200 are a lot lighter than a D800, and nowadays have pristine image quality, too. The "professional" and expensive 24-70 f/2.8 Zoom weighs a lot! Will you see the difference? Will it make a difference for your photography? I don't think so.
If you want to get nice MPG, a Maserati is not such a great idea, either. When you get a camera, the file size will need a corresponding computer, as spraynpray suggested. It may be not so important in the beginning, but once you start processing more and more pictures in Lightroom or Aperture, you will get annoyed soon.
Concerning tyres, are you really gonna go racing with it? Or do you use it for driving on the streets, and sometimes want to be a bit more "sporty" with your driving? Then, rain tyres for racing are a bad idea, because they suck for cruising in the sunshine and mean your braking distance will be much higher. Then again: Where do you live, does it rain a lot? Or do you live on a race track? Same goes for lenses: No one here knows, and since you're a beginner, neither do you know what you want to do with the camera. Just like with driving, you will first need to develop a "feel" for what you actually want to shoot. Get a standard cheap (but in Nikon's case: good) zoom first, and use it. It won't take you too long to realize what you're shooting, where the limitations are that you want to eliminate. Always want to go wider? Always want to go longer? Never using the mid range? Always ending up using mid range? Want that nice shallow depth of field? Keep on shooting. In a couple of months, you're gonna know what you *really* need, and not what others (including us here) are figuring you might want.
And, most of all, as msmoto said: Learn to drive first! Have someone show you how to drive best if you are driving around a VIP, and how to drive best when you want to take that turn on the race course as fast as possible. Do that photography course. And buy a good photography book. The technical parameters (aperture, ISO, time, focal length) are quite easy to learn, but someone has to give you an idea what the difference is when you take a portrait of someone with a 35mm or a 200mm, for example.