Pune

You won't be able to get a good college with 80 percentile in CET exam. You can get admission in an average college.
Good luck.

Yes, it will help you. The job prospects depend on your skills, which you have developed during the entire year.

It is not that good as Pune has reputed B-schools like Symbiosis, PUMBA and MITSOB.

Both the campuses are quite beautiful and lush green. But as I have to select any one then I would say it depends on the student.
Talking about the Pune campus:
Campus is a state of art campus. The infrastructure of the campus is great and the hostel room are one of the best but it has no playground as the development is in progress.
Whereas Harihar campus:
As campus is built in 90's. He infrastructure is OK as compared to Pune but the sports facility is awesome.
So, it totally depends on you but in my opinion Pune is a better option.

The fee structure for BBA at Symbiosis is about Rs.1.7 lakhs to Rs.2 lakhs. The average package offered is Rs.12 LPA. I think, the highest package offered at PUMBA is Rs.20 LPA.

I think, Pune has better institute for MBA like,
1. PUMBA.
2. Symbiosis.
3. Indira.
4. Flames.

Yes, it provides. Follow this link for more details: http://www.uimpune.org/course.html#specialisation

Below mentioned are the decent colleges in Pune:
1. SIBM.
2. SCMHRD.
Below mentioned are the decent colleges in Bangalore:
1. IIM – B.
2. NMIMS.
3. SIBM.
4. Christ.
Below mentioned are the decent colleges in Delhi:
1. IIFT.
2. IIT – D.
3. LBS.
4. BIMTECH.
5. MDI.
6. IMI.
7. FORE.
8. FMS.
You can check the below mentioned link:
https://www.shiksha.com/mba/ranking/top-mba-colleges-india/2-2-0-0-0