Hi Varun,
I understand your anxiety and predicament. I feel right now you won't face any problem as you have an assured tenure of 3 years, which is quite a long period to plan for your future. By the end of this tenure, you would have acquired enough experience and maturity. And don't stop exploring better opportunities, keep trying.
So far as your worries are concerned, look at this checklist (treating your unit as a 100% fully-owned government of India enterprise registered under the Companies Act or a corporation, being a 'Mini Ratna' CPSU) -
1. Salary = No problem (still, I won't rule out the possibility of enhancement coming in your way on their initiative)
2. EPF and Gratuity = 100% assured
3. Bonus = If eligible, at least 8.33% in the form of ex-gratia, if and when declared considering your 'salary' level, beyond the coverage of the Payment of Bonus Act.
4. Terminal benefits (if tenure not extended beyond 3 years) = ?
5. Leave = ? But legally, you are entitled to all types of leave. Have you not availed any leave in the last 6 months since you joined here? If not, try availing for a day or two, as a test case, and let us see what happens. No one can deny the right to leave.
6. Pension = ? Almost not possible.
7. Residential quarters/use of Co. vehicle = Yes.
I hope, in the course of time, all your puzzles get sorted out soon. Don't worry, gain more technical and overall experience as much as possible, which will only take you to places. Keep in touch. All the best.