What is the procedure/conditions for changing my engineering college after the first year under the Pune University?

You can definitely change after your first year at Pune University. The procedure includes fulfilling some requirements,

• First of all, you will need a very good aggregate in the first year.
• You will need NOC from your previous college.
• You will require your 1st-year marksheet and your class 10th and 12th mark sheets.

It is really a very easy procedure, Many of my friends have also followed these steps and successfully changed from one college to another without much hassle.