Ummm where can I find the torch moddel and flames..
Dunno about torch models...but to make a flame:
Place a fx_runner in your map, select it and press N - entity window will open.
In the key box type fxFile, press tab
In the value box type env/small_fire, press Enter
Close the entity window.
Wherever you place that you'll get the small fire effect much like a fire torch. You'll have to place a yellow/orange colored light there too so it appears to illuminate the area.