kumargmks how long is your trip? if you are not planning to drive long distances at night no need for extra lights. if its raining cats and dogs and if you are not comfortable in driving park your car safely by the road and wait out the rain to slow down.
you should carry the original rc if you are going out of state, the insurance paper, the pollution under control certificate and your driving licence.
if its a private vehicle no need to stop at check posts if going out of state.
regarding preparing your car for a trip - one week prior to your trip give your car for a check up at your maruti service centre. the coolant, the engine oil level has to be topped up. the brake fluid level had to optimal. the fan belt has to be checked, the battery water has to be topped up, the wind shield cleaner fluid level has to be topped up.check the wiper blades to be sure that its wiping the windshield adequately if not better change the blade,if the brake pads are worn better have it replaced. check that all the tools needed is there . check the air pressure in all wheels including the spare tyre .make a print out of all the maruti authorised service centres in you route .adequate drinking water & food can also be taken along.if you are going to places where ther ar no facilities for puncture repair, a electric / manual tyre infllator and puncture repair kit is advisable.ag route map and GPS would help a lot in saving you from getting lost,