150k service looming in the horizon

Hej all you wonderful people, As the title suggests big service coming up on my 2010 freelander 2, been quoted over 500 pounds for just changing oil and filters in gearbox and the transfer box can't remember the abbreviation. Couple of questions, is there a cheap pump you get hold of to do this complete oil transfer. Would like to change all the oil in the gear box rather than just draining and refilling. Are there any other jobs that would be wise to do other than normal servicing of motor oil, filter, diesel filter.
I have notice that the fuel consumption has steadily been increasing over the past year, when i got the car it would do 6.5- 6.9 liters to the 100kilometers now it is touching the 9.0. Now I know this might be the cold weather we are having, (-25c) it's normally settling now around the 7.5 - 8.0 lt per 100kilometer. Is there something i need to clean gunge out of etc etc.
Looking forward to my first meet with the regional Swedish Landrover club this weekend, might post a few pics if I get a chance.

150,000 or 15 years then the belts need to be changed if not done so already, along with water pump and antifreeze, tensioner, etc

Are you having the air bags changed