Colleges in Ludhiana

Yes, you need to appear for the entrance exam irrespective of the marks you have scored.

It is available on their website and past rank records. Still, you may check with your marks in College finder sites like here in Shiksha.com.

Baba Khajandsa College of Technologies
CT University
Punjab Agricultural University
Lovely Professional University
Punjab College of Technical Education.

Eligibility for M.Sc. in Food Technology:
Candidates wishing to apply for the course need to fulfill the following eligibility criteria:
Graduation completed from a recognized university.
A minimum aggregate score of 50% (45% for SC/ST/OBC candidates) at the level of graduation.
Graduation needs to have been completed in any of:
Chemistry
Biochemistry
Botany
Zoology
Microbiology
Biotechnology
Home Science
Agriculture
Food Science and Nutrition
Food Technology
Candidates awaiting their graduation-level examinations results are also eligible to apply on provisional basis.

According to me, JECRC then Poornima, then Arya but I will suggest not to go in this college if you are eligible for LNMIIT, MNIT, BITS PILANI you can see the placement record and faculty staff from their college website you get better idea about the college.

There are 2 courses offered in PAU: M.Sc Food Technology and MS Food Science & Technology. For admission in these courses, you need to have B.Sc in the same subject to be eligible for this course.

The online application fee is 35 and can be paid by debit or credit card. Alternatively, payment can be made by bank transfer costing 40. The online application processing fee is payable to PAC and is non-refundable. Note that your application will not be processed until the date the PAC Ltd. receive your application fee payment. Payments by bank transfer should be made immediately after submitting your online application.

You asked about the fee structure of BCA, BCA is a 3-year academic course. So, for three years, it's 50,000/-. For the 1st year 15000/-, For the 2nd year, 15000/- and for the third year 15000/-.
The additional amount goes to exam fee, etc.
Thanks