I'm glad the Canadian market FJ doesn't have that idiot light. You will find the procedure here:
As far as oil, the filler cap states 5W-30. Dealerships may refill with 5W-20. Based on two years of used oil analysis, on a variety of oils, I've had the best results with Mobil 1 European Car Formula 0W-40. This oil is appropriate for all temps from winter to hot summer
However, that particular Mobil 1 is getting hard to find around here. The Canadian chain Canadian Tire carries the made in Germany Castrol Syntec 0W-30. I put in the 0W-30 back in Spring, when I change it out sometime in October I'll send a sample off, and will refill with Syntec 0W-30
I should mention that I noticed not one bit of difference in fuel economy, running either 0W-20 or 0W-40. Running Mobil 1 0W-20, I experienced a lot of nitration and the oil actually thickened up to a xW-30 range.
For bitter cold conditions, eg routine -40 temps, I'd still recommend the 0W-20. But I'd change it at least every 5,000 km