Is it a good option to pursue B.Sc in IT to become a teacher?

Yes, it is a good option, but after your B.Sc pursue B.Ed from good college and clear government exams to be government appointment, or you can also directly join into a private school.

Yes, you can. It actually depends on you which you course you want to pursue, the main thing is that you will have to pursue B.Ed to become a teacher.