Toyota UK has published a blog post that provides details and insights into the 60 year history of the Land Cruiser brand, with emphasis on the light duty models.
http://blog.toyota.co.uk/history-of-the-toyota-land-cruiser-heavy-and-light-duty-models
http://blog.toyota.co.uk/history-of-the-toyota-land-cruiser-heavy-and-light-duty-models