The price of a college education can be pricy. Fortunately there are many resources out there that you can look into to help with financing. First of all, i would recommend that you speak with your guidance counselor. They should have access to information and materials on financial aid. If your counselor is unavailable, contact the financial aid department at your intended university of study. They will be able to point you in the right direction.
Keep in mind that the Federal Government provides Pell Grants and loans for low income students. There are also many scholarships out there for people of certain backgrounds, ethnicities, educational interests, etc.
Many schools also offer work study programs and counseling to help you work for your education. Working over the summers to save up money may also be an option.
The GI Bill may be another option that you might consider. While it does involve putting your education off until later while you serve in the military, it may end up paying for the majority of your tuition.
I hope that this information is helpful. I wish you luck in pursuing your education.