Railways

Yes, there is a good scope in Fire and Safety Engineering. Employment areas in fire and safety engineering are:-Aircraft Industry, Airports, Chemicals Plants, Construction Companies, Defence Forces, Electricity Boards, Fertilizers, Fire Departments of Local Government Bodies, Fire Equipment Manufacturers, Industrial Processing LPG and LNG Handling and Bottling Plants, Municipal Corporations, Oil Firms, Petrochemicals and Plastic Industry, Petroleum Refineries, Railways, Textiles Industries etc. 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.

It is must for any government. Job or government colleges.

Result is declared on 4th march. You can check it.

During a job, you cannot pursue the regular B.Tech course. AMIE may the good option for you. You can also seek about the colleges (AICTE approved) offering B.Tech part time course, but NOC will be required from Railways for pursuing such B.Tech courses.

Yes, distance education is valid for government jobs. For government jobs, selection process is same. So, no partiality is possible. Where only written exams are conducted, you can be rest assured that you are treated like any other regular degree candidates.

The courses offered are: BBA transportation management and B.Sc transportation technology.

Yes, you are eligible but only for Group D or apprenticeship.