Mechanical Engineering

There are a lot of colleges in Pune for the same.
You can find about the best colleges on https://shiksha.com.

For changing your college, you have to clear all the exams of first year. Then you can apply to any college for migration but the college must be from the same university.

Yes, you can apply for B.Sc. But remember that both are different fields and you have to start from the beginning for this.

Hello,
After completing your engineering, you can go for higher studies like - M.Tech, M.Sc or MBA etc.
But if you want to get a job, then you have many options available like -
There are many jobs available for engineers in Indian Government.
You can apply for Railway RRB JE or SSE Exams or SSC junior Engineer Exams etc.
Click here to know more about Railway Exams - http://entranceexaminformation.blogspot.com/2016/06/railway-rrb-exams-are-you-prepared-for.html
I hope it will help you.
Best of luck.

Yes, you can opt for B.Tech after completing Diploma. There are some universities which allows you to do that.

Don't worry as every body face hard times in their study period, so keep calm and concentrate in your 7th semester. After that, when you are in 8th semester, you are eligible to clear your backlogs, so first complete your 7th semester, then start your backlog study with 8th semester and appear for the same.
All the best.

Hi Neeraj,
For MBA abroad you must first gain a few years of work experience, if you want to get into a good university. 2 years is minimum. Additionally you must take GMAT or GRE and TOEFL or IELTS. You can also check MS Management courses which do not require work experience. Entry requirements also vary with universities and countries hence go through university websites and decide where you want to apply.

You may have difficulty in getting admission in MS abroad because of your acedmic performance in graduation degree.

You have two best option, but Australia and New Zealand, both are very expensive country. But, it is worth for you. For low tuition fees, you can choose Poland as they accept low CGPA as well as low cost of study and living, but job prospect is not good. You have to search jobs in Germany after completing your MS from Poland.