Hi Himanshu...

For Physics:

• Concepts of Physics(Part 1) - HC Verma
• Concepts of Physics(Part 2) - HC Verma
• IIT JEE physics - D C Pandey
• Problems in general physics - I.E.Irodov
• Problems in Physics - S.S.Krotov

For Chemistry:

• Organic Chemistry - Morrison Boyd
• Organic Chemistry - OP Tandon
• Modern approach in Chemical caluculations - R.C. Mukherjee
• Numerical Chemistry - P.Bahadur
• Consice Inorganic Chemistry - J.D.Lee

For Maths:

• IIT Mathematics - M.L.Khanna
• Differential Calculus - A Das Gupta
• Objective 

Hello, 

I would recommend you NCERT BOOK for mains purpose and for advance you should go though H.C.Verma for physics, O.P. Tandon(refer for physical chemistry) for chemistry and R.D. Sharma for maths
See nothing is impossible you have 1 full year for preparation firstly clear all your BASIC CONCEPTS then go though NCERT BOOK step by step raise your level of solving books DON'T just rush for higher level books first it demolishes you and will effect your performance.

For more information about books read the article here

https://engineering.careers360.com/articles/how-prepare-for-jee-advanced

And regarding the cutoffs for all the iits  please go through the following link 

https://www.google.co.in/amp/s/engineering.careers360.com/articles/jee-advanced-cutoff-for-iits/amp

Hope this helps....