I'm 16. And I'm an aspiring photographer and film maker?

I'm getting a DSLR Nikon soon and am going to start it as a job, but I need to know:
Do I need a permit to charge?
How do I start my own minuscule business?
Do I have to be a certain age?
What should I charge?

If you have to ask these questions then you are not ready. It is not as simple as having a DSLR and starting a business. You need good quality equipment as well as lighting equipment. You also need practice and experience. There's more to having a business than you think.

You will need to sit down with an attorney and CPA to get documents drafted and tax questions answered. You will then need to obtain a business license and a tax ID number. On top of all of this you need to carry insurance NO MATTER WHAT! Liability insurance is probably one of the most important things. If you are taking pictures of someone and they twist their ankle they can sue you. And since you are under age this can make it possible for them to go after your parents. They can sue for pain and suffering, loss of wages, medical bills, etc.

So you will be needing:
Decent DSLR $700
Plenty of ok-good lenses $1000-1500
Lighting equipment (2-3 flashes, light stands, modifiers, etc.) $400-700
Liability insurance $350
Business license Varies $20-150
Business website to host/sell photos (Zenfolio/Smugmug) $70-120

So to start you are looking at ROUGHLY $2500+ And this is for minimal equipment and beginner DSLR with beginner glass.

I suggest getting yourself your DSLR with a kit lens and then a fast cheap prime such as a 50 1.8. This will be a good start to really start practicing and learning.

Then maybe when you turn 18 start looking into starting a business.

You're nowhere near ready to start a business. You don't buy a hammer, and then automatically assume you're qualified to start working as a contractor. Why do so many people think getting a fancy looking camera makes them a photographer?

By all means, get the camera and keep your aspirations. A DSLR is a great learning tool.
Start by taking classes at high school, and then college. Find work or an internship as an assistant or second shooter to an established professional to gain not only the photography experience, but also experience with the business aspect. Then, after years of education and real world experience you'll be ready to start your own business. Oh, and you'll need some equipment too - and probably much better equipment than what you're starting out with.

60% of photography businesses fail within the 1st year, and only 15% are left after 3.It's a tough field to succeed in, and all the more reason why you must know what you're doing before you start.

There's no such thing as a "minuscule business". You can be sued or have other legal actions brougnt against you with a "minuscule" business just as well as a "real" business. To operate any kind of business, you need a business license, business bank account, a tax advisor, a proper business structure (meaning such as an LLC or Sole Proprietorship or Corp) and you must have proper liability and property insurance. Then you have to have the knowledge to actually run a business, make a profit, not go broke, and not get sued. Now, you can't fulfill any of these requirements until you are 18 years of age. That is the technical aspect.

On a practical note, you do not even have a camera yet, and you iintend to charge people money for a skill you do not even have? Professional photography is far more than turning on a switch and pushing a button, and operating a successful business is even much more difficult. Most good photographers spend years learning the craft and will often work with another photographer as an assistant.

Spend your time now learning what photography really is. Take business courses in school.

You do not simply walk into a photography business, or ANY business, on a whim. There are, of course, countless people on Facebook who call themselves a photography business, but they are delusional and eventually pay the price for their naivete.