Hi there,
Here are some of my brief observations based on your profile.
• Your profile would fit into the top 10 percentile of all applicants to US B-schools.
• Extra curricular activities are decent. A right mix of academic/work-related + community activities. This will be well appreciated by US b-schools.
• The most important thing in any top international B-school would be to put together a cogent and tight application. If you are able to showcase your strengths to the schools through a strong application, you can have excellent chance. You may also take help of professional consultants to draft and review your essays. Showcase your achievements and extracurricular activities you have in your essays and B-School application.
• Now coming to your three questions
• Your GMAT score of 700 is good. It would fall above or in the ball park of average GMAT score of all major US B-schools. Please note that HBS, Stanford, Booth and a couple of others would have slightly high average GMAT scores. While you need not sweat about it, it is a good idea to improve the score if you have the bandwidth.
• Your scholarship depends only on your entire profile,
• We could split your target US b-schools into three buckets
• Reach(1-2 schools) - Wharton, Kellogg, MIT, Tuck, Chicago (Here, keep in mind that it's much harder to get
• Fit(2-3 schools) - Duke, Darden, Berkeley, Cornell, Michigan, NYU, Yale, UCLA
• Safe(2-3 schools) - UT-Austin, Emory, Indiana, Purdue, Carnegie-Mellon, Kenan-Flagler plus others
You may also try Chance of B-school tool
https://goo.gl/jtBrQy to gauge your chances for top B-schools.
Please let us know how you want to take this forward and we can get cracking. Good luck

Cheers!
Shoaib
https://www.genedmba.com