On the 80 series the fuse which the brake lights are on also has the automatic transmission lock so it must be a feature to stop you driving without brake lights, fuse number 4 in the internal fusebox next to drivers side
Mine was also not shifting from park, then discovered fuse 4 was out so changed it and it was going into gear but not moving, then discovered the 4 wheel drive stick had stuck between high and neutral but put it back in high and it's all good now