Hi, College tuition varies in the United States (across a range of options, from low-cost community colleges to expensive private universities). You can learn more about college financing in the U.S. (including a listing of "America's Best-Value Colleges") in this special edition: http://www.education.com/topic/college-financial-planning/

Here's another particular relevant article in that special edition:

How Much Does a College Education Cost? (from the U.S. Department of Education)
http://www.education.com/reference/article/Ref_How_Much_Does/

Here's a website from the U.S. Department of State that is designed for international students seeking to study in the United States:
  
http://www.educationusa.state.gov/
  
Their site includes info about getting a visa and financial assistance, as well as info about various study programs available to international students in the U.S.

I hope these resources are helpful to you.