No need for rage, it is a great question. You will not have to pay out of pocket at all. Each school determines its "cost of attendance" which includes tuition, books, housing, etc and provides that to the government. This determines how much each student can take out in government loans. This will be the main way most students pay for school. Medical schools sometimes offer scholarships based on needs or performance which could offset some of the cost. Additionally you can usually take out additional loans at a higher cost through banks etc.
This method leads to a great deal of debt. There are a variety of loan forgiveness programs where you can give work in an undeserved area in exchange for getting rid of debt, but it is difficult to say where these will be in ten years. There is also a scholarship program through the DOD called the Health professions scholarship program (HPSP) where students join the military and receive a free ride to medical school in exchange for years of service. There are also programs like the MD/PhD program which are extremely competitive but offer a stipend in addition to a free ride.
This is a pretty brief overview of medical school financing. Try searching (upper right hand corner) for things like how to pay for medical school and you will find some other threads which provide you a plethora of information on the subject. Also look in the military medicine sub forum if you are interested in the HPSP.
