As I once heard Moe tell Larry when Curly was up to some of his shenanigans...."Everything starts at the beginning"
Israel you have presented a situation with some parameters and the reasons for those are unknown. We don't know why the credit is or your income is but perhaps it does not really matter in determining the answer to your questions.
1. I'm a first time buyer, i have no ideal how to go buy it
Then it is time for you to take steps to correct that situation. Here's my suggestion: Hud has an excellent site for people who are unfamiliar with the buying process and resources available for helping someone in your situation, so start doing some research, get informed, learn what options you actually do have.
I would start here and read everything on this page carefully..http://portal.hud.gov/portal/page/portal/HUD/topics/buying_a_home
I would absolutely make use of one of these Homebuyer Classes (WHY? Contacts, info on loan options, programs, most programs help find financial assistance ect.)
A must do for you IMHO ..http://www.hud.gov/buying/localbuying.cfm
I would make use of this Fed. site of all current Fed. loan programs to become familiar with them and again to begin preparing to make use of and learn about the process..You can get specific information, compare options, or take a short questionnaire to determine your eligibility for each program.
2. I need help
The above will help you begin to get actual help by making contacts, becoming a little more informed and knowledgeable about your options based on your situation.
3." I'm income is 13,260 a Year , and my Credit is "E" do I Have A Chance of buying at les a Three Famliy house."
A. With what you know about the process now do you really want to try?
IMHO no because to be quite frank in your situation with no real knowledge of your options, rights, the process you are far to likely to become the victim of some low life.
B. Do you really think you are currently in a position to achieve the goal you have suggested you have? Unrealistic IMO...
Can starting at the beginning help achieve the goal you have set and is it possible if you begin becoming informed?