Degree

Hi,
There are many colleges which provide a degree in the aviation field. Though there admission process may vary. Please find the link below for the detailed information on the colleges available, you can put the filter for degree and then you can also compare the colleges as per your requirement:
https://www.shiksha.com/aviation/colleges/colleges-india?uaf[]=credential&ts=42374965&rf=filters&cr[]=9

To become a tour guide you can pursue BA in tourism or BBA in tourism and travel management. You can consider Garden City University-Bangalore and Sikkim Government College.

The Indira Gandhi National Open University, (known as IGNOU) is a legitimate deemed university offering degrees that are recognized worldwide. You can use the degree to further your studies abroad as well.
Getting into a good foreign university primarily depends on your area of study, your scores in the current degree, scores in the entrance exams (E.g. GRE, TOEFL, etc.), supporting academic documents and work experience (if any).
Regards.

Yes, definitely, you have a chance to get a call from IIMs, provided you do well in CAT. For a better idea, you can visit the website of IIM and can check out about the weightage each IIM gives to these components, as each IIM gives different weightage to your past academic record.

No, they do not offer this course.

From this year, there is no equivalent for B.Tech. You have to take regular classes for B.Tech, and then you can apply for M.Tech.