VFX

Go for Picasso Animation College (Bangalore). They'll provide you a good knowledge about animation and VFX.

I think you have to visit Arena Animation. Maybe they can provide you better guidance and Arena is also a very good academy.

Yes it is possible to pursue VFX directly after 12th as its eligibility is 12th pass from any stream.

The fee for web designing course differs from one institute to another. Kindly refer to the link below for further details:
https://goo.gl/HAZzA6

Yes, you can study VFX after your Diploma. As the Courses offered for VFX has a wide curriculum, you will get multiple job opportunities.

Hello,
It is good that you are interested in VFX, its scope is vast and has ample career opportunities. If you want to make a career as a VFX artist, then you will have to be proficient in using various software, and understand the techniques of creating good quality, and realistic visual effects. You will have to enroll for a career program which begins from basics and takes you to the most advance level.
A career counselling session from an expert from the industry can surely help you in choosing an appropriate program.
All the best