All of the below are Toyota factory wheels, though not all originally specific to 80-series. None require spacers. The factory alloys on US market 80's are 16 x 8 with zero offset (so 4.5" backspacing), and are too wide in my opinion for a flareless 80. I don't dig the "wheels sticking out past the fender" look, but if you do, go for it.
For a 16 x 7 wheel, you'd be looking for a 12-15mm offset, which keeps the backspacing at around 4.5" (the 4Runner wheels pictured are 4.59"). The factory 16 x 6" wheels that came on 80's in other markets had 30mm offset, so, again, about 4.5" backspacing (4.68"). The factory 70-series steel wheels pictured below have zero offset, so 3.5" backspacing.
OK, here's some photos:
255/85R16 on a flare-less 80. The wheels are OEM 80-series 16 x 6 steel and are original to the car:
View attachment 2961056
Here's some circa 1999-2000-ish 4Runner 5 spoke alloys with 265/75R16:
View attachment 2961058
And some T100 factory steel wheels, tire size unknown (I believe they're 255/85R16. They look like 33's):
View attachment 2961063
Some 235/85R16 on Toyota 70-series steel wheels (super skinny):
View attachment 2961067
And some Hilux steel takeoffs. These are 17 x 6.5 and are sometimes available in Europe and/or the Middle East:
View attachment 2961065