Career

take B.Sc math hons or B.Sc IT or B.Sc CS and do MBA or MCA

if you want to do business or your own work then Bachelors degree is not important you can learn courses online its easy but if you want to do job you must have a degree

the best career after doing B.Sc is go for CAT exam good luck

first of all the career u choose should be of your interest and u sure that you are capable of doing that. still if you want a 6 figure job u should start getting to work as u should prepare to score atleast 75% in your 12 board and if you like to do engineering start preparing for JEE exam. if you get selected for IIT, NIT. good if you want a private university go for amity university, Srm university. VIT. then you can try for a job in another country.

Yes,you can as Banking is also a part of Service industry and Hotel Management degree makes you eligible for the same.

Any engineer can make it to Civil Services by his hard work.