Sir's and Madam's

I just had my first diesel SUV - and i am not really familiar
with the diesel car maintenance, so need expert opinions and
advise the do's and don't's--thanks...

Also I had my everest do the 1k KM check-up at ford libis,
but seems that i am not satisfied with what they did... the service
advisor just told me... they just checked the tires - and tire pressure
and check all other things... there were no checklist presented to me in documented form..
so i really dont know whether all the things listed in my warranty card was done properly and was checked properly... and i was also charged 700pesos for the complete wash....but still not satisfied since my interior was not properly vacuumed...and my exterior have still wet spots and my tires i think are still dirty...but the engine wash was a bit ok....
The service advisor also told me ..to if i wanted in my 5k KM check up, that my everest have a undercoat and rustproof (arnd 8k pesos)--is this advisable???