HI LIKITH, 

FIrstly, We are Glad to Know that you are an aspiring engineer who wants to join engg in IISc Bangalore. 

Since you are In Grade 11 , Its the right time to think about the qualifying rank in competitive exams in order to join IISc Bangalore . first and foremost , you need to know which exam you are giving and in IISc its called BS in engg. You need to qualify JEE advanced to get Into IISc  or IITs. JEE - also called as JOint Entrance Exam which is being conducted by NTA from 2019 onwards. In order to qualify main , you need to get minimum of 90 marks for general category and SC/St requires minimum of 45-50 marks to qualify for JEE advanced. 

These competitive exams results and ranking is the basis of selection for IITs and IISc . For you to joi IIT you need to pass JEE advanced with minimum of 80 percentile. It is better if you get ranks within 500. With that you have more possiblity to get selected, as they prefer lesser rank students.

When FEE structure comes into picture,  Well there isnt correct exact fee structure for BS engg in IISc , but generally , the fee for the Bs program includes -

• TUTION FEE (annual ) -10000
• Gymkhana (annual) - 1200
• other academic ( annual) - 3700
• Student emergency fud(annual) - 300
• Satutatory department( refundable) 7500 ( deposited in first year only)
• Library deposit ( refundable) - 7500 ( deposit in first year only)

Whereas for other ppl like Sc/STs FOr them a slight variation  , where 

Tution fee is the only one that is weaved of completely. Rest details of THe fee structure Remains same.

All The best for your JEE main and advanced. MY suggestion , IF youre a hard core aspirant for engg, then I suggest you to check out NIT Surathkal.It is one of the famous institutes acoss India for that , Just by qualifying IN JEE mains, you can get a seat In NIT . 

All the very best. Prepare well in and attempt application level problems as well as GOOD LUCK on your preperations. 

Good Luck , 

Thank you