Minimum Score / What Universities See in Student

There is no Such score,but some universities Eligibility >= 1000
Top universities give lot of importance to Research done by student in the field of study,Academics ,Statement Of Purpose,Resume,Financial Documents, how early you apply along with GRE / TOEFL scores.

FAQ On GRE

http://www.jamboreeindia.com/gre.asp
http://geebeeworld.com/FAQ/GRE_FAQ.htm