Shrijit, If the front bumper is of metal, get it professionally painted, and it will look nice. If not, T3 bumper is a nice idea.
Regarding the rear bumper, if you want a T1 bumper, you can visit scrap yard or second hand part market and hunt for a good condition bumper, later get it painted. I guess Mallick bazar in Kolkata is the place for parts of old cars.
Regarding the service, i would suggest you to change all fluids too, also get the engine properly tuned.