I personally don't think it's time for you to get a car because you are still very young. I know that's the BIG thing to do at 16 but owning a car is a HUGE responsiblity. With the rising gas prices, insurance, unforseen breakdowns it could be quite costly. I didn't have my first car until I was 20 but I was able to manage by getting rides, carpools, and public transportation. I would take some time to make sure you have enough money saved. I don't know of your current situation but talk to your parents about some possible options.
Trust me on this, you have the rest of your life to be grown. Take time and enjoy life. Once you start working and paying bills you will be doing that forever!
I know this isn't what you wanted to hear but its just some advice