CBSE 10th

Yes but for getting top colleges you really need to score well in CAT at least above 95 percentile for getting call from top colleges and above 98% to getting call from IIMs.

For normal people, it is around 82% - 85%, but for people with Hindi minority, it is 70%.

Event Management Degree or Mass Media Graduation can take you to a good understanding of Event Management. I believe that it is the College or University Life, which actually teaches such things because you also get to do such even management and more. I shall suggest that you can do class 12th with any stream, be it Science or Commerce or Arts. However, the best Option is Commerce or Arts, so that you have time to develop your knowledge, personality and interest in management of events.

Hi,
Yes, you can apply for Certification of Japanese Language after 10th. Please find the link below for detailed information:
https://www.educationforever.in/college/international-institute-of-language-and-culture-iilc-kolkata

No,
You can go for Diploma. There are many Diploma available after class 10th like Diploma in IT, designing etc.
Good Luck.

Yes, you can go for a 3D animation course.
Good luck.

You can get admission either on the score of JEE or class 12th percentage basis, so share your score/rank or check the cutoff of the institute from their website.

Yes, you get a seat at Sathyabhama University.

First, take MPC stream in intermediate. You can write NATA exam. After that, based upon your rank, you can get seat for various colleges.

You can Join Polytechnic Diploma in government. For bright future, especially CSE or ME have a good scope now a days. Work hard and have faith on yourself. Apply yourself for a target you have made surely you will get success. Best of Luck.