What should I do to get my start in photography?

I'm getting a Nikon D3300 for Christmas. I've been taking pictures with my dad's D300 for a while and he has some very high quality lenses that I have access to. These are lenses such as the 70-200 F2.8. I also have access to a 200-400 F4 and many others. My question is can I photograph for very cheap for someone? Is it legal? Could I charge like $10 for a day's worth of work? The only reason is to try to make the money back that the camera costs. Thanks so much for the help and have a Merry Christmas!

You can try wedding portraits sporting events.
It's not a bad to get contracts so that people can't say you took their pic without their consent.
You should be able to find a standard model release form online

Don't start charging for work until you thoroughly know the basics of photography and lighting and can take sellable images under any lighting conditions.

At the moment you have nowhere near the experience. Certainly don't be doing weddings - you're likely to end up getting sued if the bride doesn't like the images and believe me, that'll cost a lot more than a D3300.

If you're only aiming at ten dollars, you might as well do it for free. Ten dollars barely gets you a memory card.

And I second what deepblue said… If you think you are ready to accept money right off the bat, this shows the low regard in which you hold the art of photography. If you think that having a DSLR makes you automatically entitled to charge, that attitude will mean you spend more time thinking about money than thinking about improving your photography, and that your "clients" merit nothing better than an inexperienced beginner. Think about it - it is actually rather disrespectful.

If your photography is worth anything at all, it is worth more than $10 for a days work.

Do not forget that it is the photographer which makes photos - the camera is simply the technical means.

Merry Christmas JAck, just take it slowly and enjoy, the more money you earn the more the tax man asks for, that's why I work for free.

NO!
In my opinion you should do Family & Friends for free to start with.
It will give you invaluable experience so that will help you and the photos will be appreciated by the sitter.

The steps that you should take prior to charging anyone any amount to do anything are:
1. Read the manual.
2. Read, understand and know the fundamentals of exposure.
3. Read, understand and know the ways of controlling light
4. Read, understand and know the fundamentals and advanced theories of composition.
5. Study the work of other successful photographers and painters to learn composition.
6. Take a series of classes from your local community college, or university on photography.
7. Shoot everyday practicing what you've learned through your studies and from the mistakes that you've made.
8. Build up a portfolio of your best work and have it critiqued by a professional photographer.
9. Join a local photo club or ask a local pro, teacher, professor to be your mentor.
Someone who can guide you through the process.
10. Once you have the fundamentals down, volunteer your time to take portraits, or whatever genre you prefer. This time is to be used to learn what it's like to be on the job while not having the full responsibilities that come with doing a paid job.

This should keep you busy for the next 2-3 years. Then come back and ask what you should charge.