As per your question you want temporary decoration in your house.  In the govt. quarter paint and whitewash is done by department.  Below are some suggestions, which can help you decorate your home:

1. Let’s start with entrance (main gate). You can fix decorative lights/lamps on gate pillar.
2. You can keep 3-4 earthen pot in 2 rows having 18 inch to 24 inch flower plants in them.
3.  The earthy port from gate and house should be decorated brick edging which should be white washed.
4. Keep some flower/ornamental plants in your front and back verandha. 
5. A good looking name plate with your designation may be fixed with the gate.
6. Now let’s move into your drawing room, here you can put full size carpet.

7. Place good looking modern sofa set, center table and small side table in your drawing room.
8.  You can put some decorative piece in showcase and in the corner of your drawing room.
9. Let’s walk in your bedroom; here you can place rugs in the side of the beds.

10. Now what in your dining hall? Here you can put good looking crockery cabin, dining table and modern design dining chairs.

11. Hmm…. Let’s have some fresh fragrance in your bathroom. Here you can put corners, towel stand.
12. Now for some general decorative tips…..You can fix wallpapers on wall according to your choice, as they are not so costly.
13. Develop your front and back garden with proper plants and grass. Good looking sceneries may be fix on the walls.