CCNA

It all depends on your job role and career aspirations. If you are working on Microsoft technology, then obviously you must focus on Microsoft Certifications. To start with, you need to start with a single certification at a time. You cannot sail in multiple boats simultaneously. If you want to go for Cisco path then start preparing for CCNA and don't get distracted. First become expert in one domain and then when you are expert in one domain then exploring multiple domains.
All the best.

Government exams and the IT certifications you mentioned are different things. Understand the fact that government exams are aptitude based. You will have to prepare Maths, English and reasoning.
If you are preparing for government exams and in your spare time you think of doing these certifications then go for it. But, if you think that your certifications will help you in exams then it's a wrong notion.
Yes, you can go for government exams till the time you are eligible for them.

You can get a job on the basis of your skills and diploma but it will not help you in a long run. A diploma can fetch you a job for the time being but in order to grow, you need to have a degree. CCNA is a certification which will obviously increase your employability but a degree would be required to get in to good companies and grow

There is no such college, which will teach you hacking. There are private institutes which will provide you training on Ethical Hacking. As you are already doing CCNA I recommend you to do CEH after it. All the best.

The courses which you are referring to are certifications. CCNA, CCNP are certifications provided by Cisco. You need to prepare for the certification exam, apply for the exam and clear the exam in order to be CCNA, CCNP certified. There is no college for it as it is not a degree program. There are many regional institutes which provides training for such courses. Figure out a good institute near you and they will guide you ahead. All the best

CCNA CCNP such courses are not taught in colleges. The trainings are usually conducted by private Institutes and then you need to give a certification examination. On clearing which you become CCNA certified.

Go through the link below for complete CCNA details :
https://www.shiksha.com/ccna-chp.

Hi,
Please refer to the link mentioned below:
https://www.shiksha.com/it-software/networking-hardware-security/colleges/ccna-colleges-Vadodara