Hi sudhirgupta93,
You ask some important questions. Beyond how they apply to Test Day, the answers to these questions can help you to better train for what you'll face during the Official GMAT.
1) To start, if you've studied properly, then you shouldn't need to take any study materials with you to the Testing Facility. To your immediate question though - do NOT take any study materials into the Testing Facility - simply carrying in those materials is a violation of the Exam rules and can get you kicked out of the Test Facility (and you will not be refunded your Exam fee).
2) You are not allowed to take anything into the Computer Lab with you (no phone, no food/drink, no jacket, no watch, etc.). You are allowed to eat/drink during your two 8-minute breaks though (when you're outside of the Computer Lab).
3) The concepts and patterns that are Tested on the GMAT are consistent and predictable, but you will NOT have seen any of the specific Test Day questions before. With the proper study materials and Tactics, every question that you face on Test Day should remind you of questions that you've already answered before though.
4) One of your goals on Test Day should be to be efficient with each question that you face (even if that means 'dumping' the question because it's too hard or too weird). As such, 'blocking off' a specific amount of time for a group of questions can be problematic to your overall performance (as the questions might require more or less time than you've allotted).
5) Many Business Schools have publicly stated that they do not use an applicant's IR score when evaluating an application, so it's unclear what you mean when you ask for a 'safe' IR score. The current average IR score is between 4-5.
As far as your studies are concerned:
1) How long have you studied?
2) What materials have you used?
3) How have you scored on each of your CATs (including the Quant and Verbal Scaled Scores)?
4) What is your goal score?
GMAT assassins aren't born, they're made,
Rich