Outer Limits 4x4 Board

Well last summer driving my lux without a/c nearly killed me. It's a 1990 model 2.8 which has never had a/c init.

What makes up the a/c system?

Will I be able to get the gear from wreckers or is there parts that need to be new and fresh to get cold air?

And what prices should I be expecting to pay?

Cheers fellas

Can buy everything from a wreckers, than you just need to get it gassed up from an a/c place.

I have most of the bits, the compressor needs a bearing replaced bar the switch in the cab.