If the baffle is good, it means the oil side was rarley used which is a good sign. The link the Mayor provided will be a good resource for you (I think that is one of cokehead's (a member here) threads). There are a lot of TARM owners and dealers on that site including the original owner of TARM USA IIRC. Try and get the coal baffle mentioned as it makes burning anthracite an easier task, it goes in the rear of the firebox. There are several TARM threads over there, do a search and you will have a boatload of info. Also there is a thread of mine on moving one, you may want to read that one. The thing weighs 1400# and is tall and very narrow, it will be a treat.
Be sure you get all the pieces of the recirculating loop if you can, pumps, valves, ThermoVar, etc. Those peices can get very pricey, without them your wood burning efficiency will go into the toilet and it will smoke and load up w/creosote (like a real wood burner