early 90's toyota go for 1000 up to probably 5000. For me personally to buy an early (90-95) truck, itd have to look really good with somewhat low miles for tops of $5,000. Mines a 92 and in decent condition, 164,000 miles, 22-RE (which is the toyota 4cyl EFI) 5spd for $1,500. They are darn good trucks if they are taken care of. the extended cabs are popular for that time, and shouldnt be hard to find. I see more of them around here than regular cabs. Im not sure of the gas mileage, as i havnt ever checked mine. But should be around 20, or a little less. It depends on how you drive it. My 92 has good a/c and heat. works well. ive heard of these yrs trucks going to 250,000 + miles easially.
hope that helps
-Adam-