Instant performance recommend petrol but for overland travel recommend diesel. Significant fuel saving over petrol.
Cross border diesel is more freely available than petrol. 2ndary diesel filter easily installed for extra piecenl of mind.
A Prado is a Land Cruiser albeit not a 70series however a heck lot more comfortable and still very capable. IMO a Jimny is very capable offroad but one would not use it for overland travel