Model the tooth from that single poly. Cut it, extrude, do what you like, but don't change its borders.
Now you have to copy the tooth. Use shift + Rotate or Array. Anyway, you need to make a precise turn. In this case I made a 10 degrees turn and then created 35 copies of the tooth.
Voila. Now just attach all teeth to the main object, weld the verticles, and you are done
Here my design skills failed, I had lots of ideas but couldn't find the proper one for a long time. I thought about 6 buggy style wheeles, but it made the toaster look like roller-skate. Tank tracks made it much too low. Then I tried mech-like legs. I loved the idea, but it wasn't easy to make. You can see one of failed designs here.
As I said before, details make a scene more interesting. Here you can see some of them: the screws and bolts, for which I used Wikipedia as a reference and some wires, which are simple splines converted to polys and beveled. Those twisted small wires were fun to make. First I drew 3 wavey and smooth splines, then I put on them the Twist modifier and finally some FFD. The leg and arm joints (arm joint on this screen) are spheres and cylinders with a lot of beveling and extruding, and a bit of chamfering.