Oly07tdci

Hello! This is my first post, hopefully not the last I have just picked up my first landy, a 2007 tdci 2.4 defender. As its a LOT different from my previous car (clio 1.2 petrol) can any give me useful tips for driving it, i.e what sort of rev range band should i am for? Also, until i get full out n about going off road how and how often should i use the low range box to keep it from seizing Cheers for any help