put it on a lift, it has a drain and fill plug, just like any other car.
check the Distributor.
I would advise you to check out the Previa site on yahoo. It is an excellent site. Check this site it out http://tarago.blogspot.com/ , it helped a lot.
There are many great places to read consumer reviews for the Toyota Previa. The online resources are the easiest to access. Check out "Kelly Blue Book", "Consumer Reports", and "Consumer Guide".
There are many van Toyota has. You should check out the Avanza, Innova and Previa. They all have been revamped in 2016 and have state of the art features. Take a test drive of all the cars.
under driver seat where the engine is located, you'll see the oil dipstick. It's yellow in color.
Check the underside of your fuse panel cover. It should have listed there location of each fuse as well as which one is which.
You will need to go to a repair shop and have them scan for codes. That will tell them the problem and when it is repaired they can reset the light.
Headlights have to be adjusted by a licensed facility because it is a state regulated thing. Check in the phone book for professionals that are licensed to do so.
get a haynes manual at a library
check out http://www.autozone.com/az/cds/en_us/0900823d/80/22/c9/8d/0900823d8022c98d/repairInfoPages.htm
lift the seat (driver) open the cover if it is a pm put 3 qts and start engine check level and add as needed
check the fuses,if it has currents,,and still don't work, then replace the cigarret coil lighter that you use to light up the cigarrete with