Computer engineering : Normal range : 3 lakh to 1.5 crore

Mechanical engineering : Core branch : 1 lakh to 42 lakhs

Figures are given by considering all colleges of India.

If you get into some management jobs through IIT, you may get even higher salary

Salary depends on many factors like College placements, skill, talent, knowledge and your grades in engineering program.
Top government colleges like NITs, IITs and top private colleges like BITSAT, VIT and Amrita provides good placements.

CSE and Mechanical are both core branches of engineering and provide lot of scope in the future.

CSE Expected Salary
Average salary package for freshers is from Rs. 2.4 Lakh PA to Rs. 8.5 Lakh PA provided by MNCs. However, this goes up to Rs. 1 Crore PA for jobs offered to IITians by IT giants like Facebook, Google and Twitter. The top notch financial sector giants like Moody’s, Meryl & Lynch, Poor & Standard, HSBC, City Bank etc offer Rs. 10-30 Lakh PA to the graduates of IITs, NITs, VIT, BITS and Manipal. The middle range MNCs like Mu-Sigma and Samsung easily offer Rs. 6.5 Lakh to Rs. 8.5 Lakh PA to the graduates of government and better private engineering colleges.

Mechanical Expected Salary
Average salary package for freshers in this field is Rs. 1.8 Lakh to Rs. 5 Lakh. It can be increased as per the experience.

Good Luck!!