the first 4 years of college should be free here in America.
are they free in any country in the wolrd? 
In Finland they are! Students are also assisted financially, but obviously there is a catch.
1) The universities are quite difficult to get into. Whilst in UK I only posted my (equivilant of) A-level/high school final exam results, along with an application, in Finland you'd have to go through entry exams, IF your grades are good enough to get there. Some even have week-long (or longer!) application processes...
2) and this is because you only have the amount of places finnish economy can carry. For example, you don't need very many stage setters in a country of 5.5million, so only around 10 people get into the programme (which is only provided in one university) per year. Competition therefore is brutal. I tried to get in and after sending prework, got into the entry exam, and got dropped out after the 3rd day of the 5-day exam. Boo.
3) When you do get in, obviously you only get the financial perks if you are a finnish citizen/resident. And those perks only keep on coming if you pass enough exams/modules during the year. Otherwise, they will claim their money back. The money is sort of enough to just about scrape through if you don't live in the capital -obviously you can also take a loan, work part-time or ask help from the parents, but the balance is that if you work too many hours per month, the government aid will be cut.
And obviously you could say it's not free as it's financed by taxes. It's more of a case that the Finnish system assumes you want to go to university to be a good citizen and then provide tax income for the next generation.
Mostly the same in Turkey.
Each department of the universities and colleges accept students with different points.
For example if you are to study meds, You should get a high score in the numerical test(which includes maths, chemistry, biology, physics questions and sections). And if you are to study literature you should make a high score in the verbal test(which includes grammar, literature, foreign language, etc.), and if you are to study in a social science involved department such as law or internationalrelations, economy etc, you should get a score in a test which includes history, law, general knowledge, etc.
And teachers colleges usually accept students with a high score in the combination of these tests.
After getting registered to one of these departments, there are two options: morning education, evening education.
Some people want to work afternoon, they choose morning classes. The fee for the morning classes is a little bit lower than the evening classes(because i guess it requires the professors work overtime). For example my brother takes morning classes, his fee is something like: 100 $. But he takes a state scholarship, 150 $ each month. So he pays it himself without getting trouble.
Mine used to be around 200 $ because i took evening classes. I could not get a state scholarship, so instead i used to get education credit from a national bank, around 150 $ per month. So now i pay it by installments which bites me in the ass.