Someone answered the question about beating the tolley using a Light Alloy..

Search the pipe area. Around the area where you get the ice boomerange, there is a steam pipe with a swith connected to it. Hit it with the hammer and the steam will rise higher. Go into it and ride it up, when you reach the top jump to the left to get a "mudball surprise" and to the right for a red chest with a half pot of life. Then go to the raised bridge. Pull the right chain to make the left one raise and climb down the right chain until you see a mudball on a platform on the left chain, get that mudball surprise to. Then go to the left until you see a tiny mouses house on a little pipe. Search the chains there until you see a red chest, open it to get a power coal. Go to grans house in the coul minning town and go out the top door. Ride the conveyer belt until you drop down by a miner shouveling coul. Talk to him and you'll give him the power coul. Go to the underground machine room and use the washing machine to wash the clumps of mud. You get two low purity metals. Hit the swith with the hammer thats next to the middle machine. Put in both low purity metals to make them high purity. Then hit the switch next to the far left machine and put both metals in. You make a light alloy.