Yes Vicky, NOtice the truck tyres under the coaches.The coaches may be be looking false but the interior and the electrification poles are real.

the coaches don't seem to be real, and they aren't standing on any tracks

Which is this loco?

Coasting, "C" denotes coasting. The driver brings the MP to zero , switches of the blowers and puts MPJ on 0 / neutral. The driver than "feels good" as he he saveing energy for his country. ( If you ever happen to be on the foot plate and the driver coasts, you should heap praises on him and he will invite you over for another FP.

It could also mean a catch siding

What is inside these boxes?

Whenever maintenance work is required to be done on the Overhead Equipment{OHE},The power is switched off in the concerned section.Whenever the OHE is rendered dead in such a manner the procedure is known as a Power Block.Power Blocks are required to be taken with the prior permission of the Traction Power Controller,Section Controller and the concerned Station Master in whose area the Power Block is to be taken.However,the sections adjoining the Power Block Section are kept energised to ensure that the movement of trains is least affected.As such to ensure that the Maintenance Personnel do not inadvertantly enter the Live Catenary area,boards such as the above are provided to ensure that no one strays beyond the Working Limit.

This sign is for an unmaned level cross to the track that seperates to the right from the main track that is to the left. This track goes to the coach reconditioning yard

Very true Jimmy, but, then this sign board seems facing the tracks rather than the road (correct me if I am wrong)!? - Sandeep Bhate.

The Hindi letters say "Vidyut Shakti Block" - Electric Power Block and also "Karya Seema" - Work Limits it seems that this may be the limit for electrified track. Perhaps this is a notice to the electric loco should not cross this point.