Okay, the service items you referenced above are pretty slim. Most of the items are inspections which can be done in a few minutes. The service book pads the "official" repair times on these items horribly. Just remember, auto shops have to make a living and pay their employees, who need to live decent lives. So the $100+/hr labor rates and padded work hours they charge you are going to good use.
You just don't have to pay those prices if you are capable of doing the work yourself, or can find someone who can do the work for a cheaper rate and without padding hours.
* The Toyota brand timing belt and water pump will run you $150 or so. Aisin makes many of the Toyota water pumps -- they run ~$50. Gates or other brand name belts will probably run you half of Toyota. I've seen labor quotes for those two replacement items along anywhere from $350 to $700.
* External belts come off anyway so they can be replaced for parts only cost, ~$50 for both.
* Items which usually don't have issues and therefore generally not replaced: Tensioner $50 with virtually no labor cost, Toyota brand pulleys ~$80-100 each with virtually no labor cost, Cam and crank seals $10 each with ~$100 labor for all three.
* Thermostat -- if you are replacing the coolant, you might as well get the thermostat at this time. It's on the other side of the engine so labor cost will be separate The part is $20, Stealership labor $200. And, you might as well also get the radiator hoses for good measure... don't want one of those bursting due to age ... $20 each?
The other items on your list are relatively small:
* crankcase oil and filter ... that's a regular engine oil and filter change
* Inspect transfer case and diff? I would replace that fluid every 40-50k miles. Very easy to replace, takes one qt 75w-90 gear oil in each. I would budget $100 or so for auto shop labor to do this, or DIY for $20-30 gear oil and four crush washers for the fill/drain bolts.
* also note on your list they are not including the water pump or coolant replacement. They are only replacing the timing belt. $1200 for that list is definitely a "stealership" price.
Fyi, using a 20% off high mileage coupon on our car at 90k, I was able to talk the dealership down from $1800 to $1400 for timing belt, water pump, pulleys, cam and crank seals, external belts, and thermostat. For whatever reason I forgot to have them include the tensioner so they did not replace it -- but that would have been another $50. I did the cam/crank seals because one of our cam seals started leaking, so I figured get the entire front-end job and we'll be good for another 90k