Can you get a green card if you came to the U.S. illegally?

You can try the bar association in your community for list of pro bono immigration lawyers who may agree to take your case for little or no money.You can also look for law students who are connected to immigration law clinics in their university Also, check out mosques, churches and other immigrant community advocacy groups close to where you live. Good Luck

You can't unless you qualify for an immigrant visa. Nothing in your question indicates that you would qualify.