What fluids do you change and when?

I am a newb to Tacoma's, Trucks, and 4x4, but I recently bought a used '06 DC Off Road Tacoma. I am big on preventive maintance, so I have started getting all of the fluids flushed in the truck so that I have a clean slate of when the fluids were changed, and then I can move forward from there and ensure the truck lasts a long time.

Here is the list of fluids I managed to change so far:
Engine Oil/Filter (every 3k to 5k)
Brake Lines (every time the pads/rotors are replaced)
Transmission (every 50k)
Rear Diff (every ?)
Front Diff (every ?)
Radiator (every 50k)
Power Steering (fill as needed?)
Windshield Washer Fluid (fill as needed)
Flux Capacitor (every 10 trips back in time)

What other fuilds did I miss?

How often do you replace the diff fluid?

Thanks

ETA:
Spark Plugs (every 50k)
Air Filter (check every 10k, with use)
Carbon Filter (remove)
Cabin Air Filter (check every 10k, with use)
Tires
Brake Pads and Rotors
Dealer Inspections for other maintenance

Thanks Brunes

 

IIRC the book says 30K for the rear. I think the rear is more or less use based....I can't remember anywhere that it says change at X miles.
I know you are only talking fluids here- but don't forget the other "consumables"-Spark Plugs, air filter, cabin air filter (if you have one)...etc.
This will help you out-Online service interval information, in case you don't have the books or anything...

 

I do trans, transfercase, front and rear diffs every 30K. Motor oil every 4-5K or six months with regular 5w30.

Have never changed brake fluid unless doing brake hydralic work already, but have decided to flush the brake fluid when changing pads from now on. Lots of expensive stuff in the brake systems now.

Coolant will be done before the 100K recommended mark. I am thinking 80K/8 years. 100K just seems too long, and they don't give a time limit in my manual.

I don't think power steering fluid really needs to be changed on a street driven vehicle that isn't having the crap run out of it. I worry about causing a leak by flushing it. Maybe if I buy a brand new truck and start doing it every 30K from the beginning I will. But my experience with flushing things that have already been put off for awhile is that they leak.