Engineer exams

Yes, it is sufficient but try to read all the chapters of text books with details.

You need to give NCHMCT JEE for hotel management.

Check the below link for engineering entrance exams date, application start date/end date, result date and admission/counselling dates-
https://www.shiksha.com/engineering/resources/exam-calendar
Check for these exams- Alliance AUEET, JEECE and TA-EAMCET.

Yes, all the state governed institute universities exam are left.

Prepare well.
There are lot of exams for entrance for examination like KIITS, WBJEE LPU-NEST and the list continues.

What is your rank?

Hi,
I see your interest to know much about the upcoming and present exams happening in engineering trade for the same I am sharing you the link of Shiksha which has created a calendar for various exams happening in Engineering trade. This will help you see the upcoming exams and prepare for the same. https://www.google.co.in/amp/s/www.shiksha.com/articles/amp/engineering-entrance-exams-in-india-blogId-5645
I wish you a very all the best for your future.

For B.Tech from IIT Kanpur, you must qualify JEE Mains and also hold a decent rank in JEE Advanced. Since, you hadn't given JEE Main, I don't think you have any chance of doing that. Also based on your 10+2 marks, you are not eligible for IIT Kanpur, even for NITs and IIITs.