Career

I can understand your difficulty but don't worry, here is the solution:
1) If you want to go only application developments and management you may select BCA+MCA, but if you want to go in pure computer science than you have to do BCA and then I suggest you to get admission in B.Tech through lateral in CSE.
2) There is also B.Sc. in bioinformatics which is a combination of biology and computer. I think, this will fulfill your all requirements. Also, it has good scope in research and field job.
I suggest you to go with bioinformatics.
But, note that if you chose any computer field then you have to do little work in mathematics. But, it will quite be simple.

Career opportunities for Travel and Tourism degree holders exist both in the public and private sector. In the public sector, there are opportunities in the Directorates and Departments of Tourism of the center and the state as Officers, information assistants, Tourist guides etc. Another good prospect for qualified tourism professionals are in the private sector with travel agencies, tour operators, airlines, hotels, transport and cargo companies, etc.
In the tourism department there are jobs as Reservation and counter staff, sales and marketing staff, tour planners and tour guides. To enter in to this field you need to pursue a professional course in this sector. Top colleges which you can consider are Indian Institute of Computer and Hospitality Management (IICHM), Nadia (West Bengal), University of Technology and Management (UTM), Shillong and School of Arts and Tourism Indore (Madhya Pradesh).