A manual can; an automatic will not, as the 94 transmission will be electronically controlled, whereas the 86 would be mechanically controlled.
To replace the injectors in 86 Toyota truck 22r, simply refer to your user and service manual.
Yes it will,
86-97 are compatible with same (2wd must be from 2wd, 4x4 must be from 4x4 and 6 cyl must be from 6 cyl)
a complete donor truck
An impact wrench works good.
Distributor pickup coil resistance 140-180 ohms.
Belt
yes, check out this website http://advanceadapters.com/product/4261/1984-1995-Toyota-Truck-V8-Conversion-package.html
Yes. You may need to make other changes, such as different flexplate, different driveshaft, or possibly different transmission mount. But it will work.
It has a chain, they should be replaced every 100,000 but I had an 1987 Toyota pickup with 230,000 and never replaced a thing on it and it ran like a dream. if your truck is running bad then replace it if not. then don't waste time
assuming the automatic was the same or near in year yes if you only swap the engines
There isn't a transmission fluid reservoir on an 86 S10 pickup. The transmission fluid is held in the transmission itself.