The kind of issue you're pointing out seem cosmetic. The headlight, for example, should only cost you new bulbs - Rs 500-1000 and perhaps cleanup of the headlight housing, another Rs 500-1000 cost.
The dashboard might be repairable, and the steering wheel might just need a stitched cover.
Point being, you're new to working on cars, don't let mechanics fool you into larger than necessary bills.