1.not easy to say, the gmat is not the sole creteria for the schorlarship. otherwise, the average gmat for the application will increase.
2.you have to send out all the materials requested by the application before the dealine. though some universities will accept the later application, but they dono't gurantee the available place.
1. Don't expect full scholarship from these two schools. 5,000-10,000 isquite reasonable. around 10% of the Chinese students in Ivey get this kind of scholarship. Gmat is not the only criteria, the people get scholarship is not the people has the highest GMAT score. It depends on your overall package.
2. Check the deadline on each school website and follow it.