Hi Judgesx,
Since you've put in a couple of weeks of study time already, then it would be a good idea to take a FULL-LENGTH practice CAT Test; you can download 2 for free from
www.mba.com (and they come with some additional practice materials). That score will give us a good sense of your natural strengths and weaknesses and will help provide a basis for comparison as you continue to study. A FULL CAT takes about 4 hours to complete, so make sure that you've set aside enough time to take it in one sitting. Once you have those scores, you should report back here and we can come up with a study plan.
Many Test Takers spend 3 months (or more) of consistent, guided study before they hit their 'peak' scores, so we really need that initial CAT score to properly plan out your next few months of study. In answer to your questions:
1) There is probably no score that will guarantee you admission. However, if you want to know what a particular School/Program expects from its applicants, then you should contact the School/Program directly and ask.
2) The Verbal section of the GMAT is as consistent and predictable as the Quant section is, so you CAN train to score at a higher level. You'll need to learn the necessary content and learn/practice the proper Tactics.
3) A pencil-and-paper Exam is not comparable to the Full Adaptive GMAT, so there isn't really a 'comparable' score that I would offer.
4) Training for the GMAT requires the right 'mix' of materials, Tactics and effort on your part. 2-3 months might be enough time to get you to your score goal, if you follow a consistent, organized schedule and properly hone your skills. But we won't know until you begin a formal study plan and we track your results.
GMAT assassins aren't born, they're made,
Rich