Is this for startups or product companies ??

Software Engineer

Did you mentioned in the question if you are asking for service based or product based company? 
  
 Majority of people are employed in service sector so it is for service sector.

Software Developer

Living cost will depend on your wants. 
 If you live in a 2-sharing pg it will cost you somewhere around 10-15k (this includes pg food) 
 Food related expenses if you order frequently might be another 2-3k 
 Travel expenses can be 1-3k based on mode of transport and distance to office  
  
 So somewhere around 20k 
 You can reduce this further if you are more conservative with your spending 
 Or increase it by 10k if you opt for a 1-sharing pg or a bedroom in a flat

What is the average starting salary for a fresher a Software Developer???
What is the average living cost in Whitefield area of Bangalore ??

Salary Comp