Class 12-Commerce

M.Sc is a post graduate degree. After 12th, you need to pursue under graduate degree. First, pursue B.Sc in IT and then opt for M.Sc in IT to get good jobs.

No. You cannot. You need to have science stream with PCM.

http://www.apnaahangout.com/courses-to-do-after-12th-commerce/

yes if your age is 18 u can give exam for clerk

As a commerce student you have many options after your +2
Depends upon your interests.
If you think you understand commerce well you can go for professional courses like CA or CS or CFA.
And if you have a good English and mathematics background you can Pursue MBA.
Besides all this their are many more options available.
But all is on your interest.

Hey Bhargav,
After completing your 12 with commerce you have a lot of options to go for. You have B.Com, BBA, BCA or BBA-MBA etc at this stage. It solely depends on your future plans and interest that which one you go for. If you want to be in management and administration than BBA will be a good option otherwise for finances and accounting B.Com is a good option. Along with this you need to select a good university with good placements and rankings to kick start your career well. Some suggestions -

Hi Tushar,
Career options are diverse and different across hospitality and economics, the hospitality sector is booming and broad opportunities are available from hotels and resorts to spa and wellness management. There are also other options in meeting and event planning, tourism, airlines and transportation etc. With a degree in economics you can find yourself in attractive jobs such as CA, Economist,Financial risk analyst etc. You must figure out which career interests you the most and which field of work would you enjoy the most to help you make a decision.

Choose CBSE board.It will give you right direction.

Any special aim behind it.

These will help you for sure !!
http://www.apnaahangout.com/bsc-bcom-indian-army-commissioned-officer/
http://topyaps.com/5-steps-join-indian-army-graduation