hello
you can see all you need about the score in this link
http://www.ets.org/Media/Tests/TOEFL/pdf/TOEFL_iBT_Score_Comparison_Tables.pdf
but the score in each section is different from school to another one so contact your school to know more about ibt requirment
and i suggest that you take the free exam in TOEFL officail site to see how it is exactely
regards