1k service is just change oil & minor checks, the clerk won't tell you what happened since they also don't know, have to talk to the mech doing your car, so if they say nothing, should be normal, unless they found something expensive broken that is covered by warranty they will wait you discover yourself, because you might go other SC to solve the issue instead of them fixing it, save them manhours.

yes, to flush out any possible debris while the car breaks in. it might be FOC i dunno depends on their promotion.

Engine & Gear oil.

Or maybe new car they decided not required? In that case what is the service for?