We've had several discussions on this in the past. Check the newbie guide on Christo's web site. He has a good section on what to look for in selecting a used truck.
Late '90s puts you as a candidate for either the '96/'97 80-Series or the '98/'99 100-Series. They're both Land Cruisers but there are as many differences between those two models as there are between the 60 and 80 series.
Let us know if you're looking at an 80 Series; otherwise drop on over to the 100 section for their advice.