Salt Lake

No, but if you want to study in any other Techno India Group college, then you can visit the main branch and have a talk with them.

Go through the link below for details and check detailed information under courses:
https://www.shiksha.com/college/techno-india-salt-lake-salt-lake-city-Kolkata-48911

Give the choices accordingly and hope for the best as opening and closing rank of colleges change every year.

Yes, with the rank of 9506 in WBJEE 2018 you will definitely get CSE branch. Last year 10000 ranked students also got admitted so you can. Best of luck for your future.

HIT-K is an autonomous private college in West Bengal. It takes admission through WBJEE. For the top branches like CSE, IT and ECE rank needed is within 7000 to 8000 in WBJEE. For mechanical branch ranks needed is within 10000. There would be better chances of your admission in the mechanical branch at HIT-K if you have rank is within the specified range. Moreover sometimes it may go down to 12000 depending upon seat availability of college and counselling process. All the best and wait for counselling to start.

Yes for Techno India it is possible but not for Heritage. Techno closing rank is 18833 after 3rd round. Check it here for further details:-
https://wbjeeb.nic.in/wbjeebcouns/orcr/PrevYearORCR.aspx.

Based on your WBJEE rank, you can expect seats in Techno India Salt Lake Institute, same link can be used to check eligibility for Heritage College. Branch choice should be based on your field of interest. Looking at current trends, IT companies are offering jobs in great numbers so Computer Science and Information Technology will be good option to look. But before making any choice, do consider your field of interest.

If 15858 is your TFW rank, you will not get it. Otherwise, if it is your general rank you will get it.