Hi,
Read this blog post on Preparing for GRE.
GRE requires at least 2-3 months of sincere preparation. If you have more than that, Good! Especially if you are not a native English speaker, you would require more time to get a reasonable score on the verbal section.
NYU has acceptance rate of 35%. So it can be difficult to get an admit but it all depends on your overall profile and application package. GRE, Statement of Purpose(SOP), Recommendation letters, Undergrad academics are all considered for admissions.
You can explore other universities at http://www.mygradapp.org/search_univ.html
If you have any more questions regarding graduate school admissions, you can post your questions on http://www.mygradapp.org/forum.html