India

These are the best colleges for Aviation in Delhi:
1. Indian Institute of Aeronotics
2. Hope Institute of Hospitality Management
3. Indraprastha Institute of Aeronotics
4. Amity Institute of Travel and Tourism
5. Star Aviation Academy.

Yes, you certainly can. NIOS and regular 10+2 hold the same value for UG admissions.

Hello Shivant,
As per my knowledge, Javascript and python programming language are preferred in India current trend.
All the best for your future.

Please refer the link below for details:
https://www.shiksha.com/engineering/colleges/colleges-Uttar-Pradesh
Direct admission is mainly through management quota as most of colleges takes admission through entrance exam or percentage in 12th boards
Go for management quota but Management quota admission and fee cost is not advertised openly by any of the colleges/universities across India as being a paid seat it totally depends on the discretion of the college authorities. Please contact the college authorities for all the details.

Hemwati Nandan Bahuguna Garhwal University, Garhwal. DAV PG College, Dehradun. Hemwati Nandan BahugunaGovernment Post Graduate College, Udham Singh Nagar. Gurukula Kangri Vishwavidyalaya, Haridwar. Dear these are the best colleges for your choice of course.

Yes, you can get B.Sc(Hons.) maths if you have filled PCM.

Getting all this under this limited space is not possible and also there admission details at the same time is somewhat looks like impossible for anyone but then also I can tell you that in almost all the districts of UP and Rajasthan, you can find an engineering college and in all the colleges the admission process is same.