I have a 2005 LR3, bought it used, drove 20km in -30 weather and as I turned into a street I had no gears, nothing forward or backwards. My brake light switch is on, my park brake sign is on, low terrain light and terrain response. When I shift from N to P there is a slight grinding noise but that’s about it. Please help

Lights that’s on

 

You'll likely need a scantool that is capable of reading Land Rover codes for us to help. To start, I'd check the state of your battery and charging system. Plenty of posts in the forum and elsewhere about those topics.

 

Also, -30ºC is very cold.
Could something be frozen, like ice blocking the shift linkage on the trans?
Frozen parking brake parts?

Being from SoCal, I can't imagine those temps - haha
Maybe your LR3 is telling you to just stay by the fireplace with some whiskey!