Diploma

Approach your local IEI office if present or contact them online. Tell them you only have provisional now and that you will be able to give them real marksheet later. They will understand and will allow you to take admission. And you will be able to get your diploma certificate by the end of the passing year.

You can do this diploma as you are eligible for this college. You can also apply for the entrance exam. Read the following page and know more about admission process:
https://www.shiksha.com/banking-finance-insurance/course/diploma-in-banking-and-finance-indian-institute-of-banking-and-finance-kurla-west-mumbai-2054

The question papers should be available on the AKTUs website. Or search in Google for it. We cannot post papers here.

Yes, you are eligible for those courses.

A good college in Jaipur for B.Tech is UEM Jaipur, but I am not sure about the lateral entry which you can confirm from the link mentioned here:
https://www.shiksha.com/b-tech/course/b-tech-in-mechanical-engineering-university-of-engineering-and-management-jaipur-236802

You can go for the interview in any company who has the vacancy for Diploma engineers or either you can get admission in a college for B.Tech on the basis of your Diploma percentage.

Hi, Candidate must have passed class 8th examination to get eligible for this course. Interested candidates can apply directly to the college. Admissions are made on first come first serve basis. https://www.shiksha.com/hospitality-travel/hotel-hospitality-management/course/hunar-se-rozgar-food-production-institute-of-hotel-management-catering-and-nutrition-delhi-library-avenue-pusa-119447.

Hi, Admission to the course is based on the candidate's performance in one of the relevant entrance exams held in the country. CLAT (Common Law Admission Test) is one of the major entrance examinations for admission to the course. It is conducted by the National Law Universities (NLUs). Admission procedure may vary across colleges. Some of the colleges providing Diploma in labour laws and labour welfare through distance learning are as follows:
1. ILS Law College
2. University of Mumbai, Mumbai.