On my 1994 LC it was easy to remove the whole assembly. Three bolts plus the weird nut that sits on the fender.
I found there's more than enough room to manoeuvre the assembly out of the truck, but I've seen a few posts where people had trouble. Maybe I just lucked-out?
Gmoney, depending on what's broken in your antenna unit, you might be able to just fix it with a replacement mast from Toyota.
What tends to happen is the mast gets broken or stuck, and the inner cable can't handle the extra resistance. It separates from the mast and retracts into the drum.
You can buy a replacement mast/cable/drum assembly from Toyota. My dealer was out of the Land Cruiser ones, so I followed Semlin's post and used the Camry kit, which works fine.
I Re/re'd my antenna for under $30 and now it's as good as new.
If your motor is no good, however, that's another story. It's worth testing, though.