Hello,
Yes there is actually very high scope if you do Mechanical Engineering from top colleges.But it also depends upon your skills and profile also.Make sure to score goodmarks in semester exams.
Average salary is above 5 Lakhs Per annum for ME branch
from NITs.
Good luck.

Hiii...
Mechanical is one of the oldest branches ofengineering. This field ofengineeringis the broadest of allengineeringfields, job prospects on offer for skilledengineerare plenty and unending. They can find employment in both government as well as private sector.
There is a great scope of job avenues for mechanical engineers in India. Few of them are listed below:

Aerospace industry- In aerospace industry mechanical engineers are used to do resarch, design, manufacture, operate and maintain the aircrafts.
Automotive industry- In automotive industry mechanical engineers are used to do designing, manufacturing, distributes and perform marketing of motor vehicles.
Chemical industry- In chemical industry, they covers the oil companies, chemical manufactures and the business to build new chemical plants or to develop new process technologies.
Construction industry- In this field of industry the role of mechanical engineer is to design and build the infrastructure and buildings and its services like heating and ventilation.
Defence industry- in defence industry, they provide the equipments and provide support and services to the armed forces.
Electronics industry- In this field of industry,the role of mechanical engineers is to design and manufacture components and complete equipments for sectors from automotive and the military.
Marine industry- In this field of industry, the role of mechanical engineer is to develop the vessels and help to operate them.
Material and metal industry- In this field of industry, mechanical engineer performs the activities which include developing new material and manufacturing components or end products.
Rail industry- In rail industry, the role of mechanical engineer is to design, construct, manage and maintain the rail system component from train and tracks to electrical power system and train control system.
Utilites industry- In this field of industry, they help to supply the power, water, waste material and telecom.

It is one of the best engineering field among all other fields and have a good scope of job avenues in future.

Hope you get it...