30k service for 2007 Gen2

If budget is a high concern, I would just continue doing timely oil changes for now. Everything else is just maintenance....

 

I don't think there's any harm in delaying a year or two. You should stick with non synthetic 5w-30, if that's what you've been using. Change every calendar year or 5000 miles, whichever comes first.

 

It is late to bring this up, but each interval is expressed in mileage AND MONTHS. You should be doing the correct service every 6 months, even if the mileage is low.

http://www.toyota.com/t3Portal/document/omms/07ToyMS_MS0003/pdf/07omsour/2007/07toysmt/71w1smt.pdf

You should have done all the services for past 102 months.

Without knowing where you live, I could not prioritize which ones to do first.
Coolant in hot weather, brake fluid where it is humid, battery where it is cold, etc.

 

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You have said that spending on vehicle maintenance is a high concern. Therefore, the highest priority is to replace engine oil and the oil filter annually. Use regular, name-brand 5W-30 oil (not synthetic) to respect your budget. At 30K miles, change the engine air filter and cabin air filter. You can do all of this yourself.

The SF Bay Area has moderate climate and I would not be unduly concerned about replacing the four fluids at this time. With such low usage, your vehicle maintenance program other than engine oil changes should be to keep the 12V battery on a battery tender or use a battery charger monthly, to maximize service life for the battery.

 

There is no official Toyota service interval for the Transaxle ATF. While I recommend 30,000 miles, then 90,000 miles then every 90,000 miles, it is a just a personal balance between cost and protection. You could just as easy decide every 60,000 miles works for you. Just change it regularly. (I drive 30,000 miles a year so I have never considered the idea of ATF by months)

Brake fluid ages due to humidity in the air. It will be fine much longer in Tuscon AZ than in New Orleans LA. There are inexpensive test strips you can use to measure the humidity in your brake fluid. I do not think either months or miles are important, just water in you brake fluid lowers it's boiling point and causes rust. Neither sounds like the brakes I need.

The coolants also include rust inhibitors, but mostly just need to keep your engine cool. There is a specific gravity test to see when it would boil. The test should be cheap.

The San Fransisco Bay should be humid and cool, so the brake test may be more important than the coolant tests.

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It uses the exact same fluid, it is just a separate loop with a different ideal temperature.