Nothing special, as with any engine the oil should be hot as the oil is thinner and thus will drain easier, also once draining remove the filler cap as well, if you haven't already make sure you have the right filter as they are different between 2WD and 4x4.

Never prime mine, just refill and start up, you could always pull the king lead etc if wanting to turn over first to get the new oil circulating but I don't see the point personally!

Oil capacity is 3.5 litres from memory, can't remember if that is excluding or including filter!

Martin