BCA

Sure, you will get, better continue with MCA / M.Sc Computer Science / IT

This is possible through Concurrent admission system. You can do two courses simultaneously , one at regular college and another at Distance / Colloaorative mode. Better do BCA as regular , as it is higly practical oriented course.
All the Best

After BCA, you can find opportunities as
1. Software Tester / Test Engineer
2. Application Developer
3. Web Developer / Designer
4. EDP Officers etc.

Yes.you can do internship in many companies including WIPRO,HCL,POLARIS etc.please get in touch with them. Many firms are hiring freshers and train them

No scope. You should better go for CS after law.

You should go for MBA.

both are in different in their own respect I want to go for teaching or research you may go for b.sc and if computer line then BCA

From the industry point of view MCA is equivalent to B.tech in CSE. So, we can estimate that B.tech is tougher than BCA in terms of all aspects even in mathematics. BCA+MCA takes more time than B.tech CSE, so you ll get more time to command on maths in BCA+MCA, so we can say that BCA+MCA is easier than B.tech CSE because you have more time to score well in academics.