Exam

Yes, you can join NIFT. There is no age limit for Masters but for Bachelors program maximum age limit is 23 years.

The syllabus for MAT and bank POs are the best. You can get through both of them if you could prepare for bank POs, since PO exams will be tougher than MAT.

Canada doesn’t accept PTE marks. PTE is applicable in Australis only.

140 is a below par score, I would suggest you can try once more or wait for result of other entrance exams. You might get better colleges based on the results of other exams.

CAT is considered. Your HSC marks is just a part of consideration .
It won't stop you from getting admission in college.

Firstly, refer NCERT for PCM and try all the problems to get you basic concepts cleared and then go for reference books like H.C.Verma for Phy., M.L.Khanna for Maths and O.P.Tandon for chemistry. I would suggest you to join a coaching as it will assist you in preparing in a proper curriculum with we

Minimum will be 90 percentile.

You can get many books in the market. Author is not a problem, just ensure the topics asked in CET are covered.