Hello Tony,, you do not want the TSC 'on sale' furnace/stove.. let me say that again, more emphaticly: you DO NOT want that US stove product..
There are a few forum members that use the US stove product with only a few minor issues, but by far 98% of the forum members have many issues with the US Stove products when burning coal.. they are a wood burner that 'can' burn coal, but not well and with lots of issues.. Save your $1200, and put that money towards a good coal burning boiler or furnace..
Next,, get up on the roof, remove the chimney caps, and inspect the inside of the chimneys.. if the existing steel chimneys are rotting away, as Berlin suspects, then you have to deal with this..
You can remove and replace the steel chimney with a Stainless Steel insulated, Class A chimney, or my preference: build a block chimney in the same footprint of your existing chimneys.. those fireplaces are just brick and stone verneer over wood framework and sheetrock. they come apart easily [makes a mess] but when done, you have a lifetime chimney,, get rid of both 'fireplaces' and make them a hearth with a flue pipe 'thimble'. that's the connection from the stovepipe through the wall into the chimney clay liner..
then you can use any type of freestanding stove you like..
and you start in the basement, with a dedicated flue for the boiler/furnace of your choice..
OK, , now, how to heat your house: first, you can use the existing ductwork, and install either a coal burning hot-air furnace, like the LL Anthraking, these can be Powervented, but most of us prefer and recommend a masonry chimney as mentioned above..
OR, you can use a boiler, [highly recommended] use the hot water with a water-to-air heat exchanger to put the heat into the ductwork, still using your ductwork.. you get the bonus of lots of DHW,, that's domestic hot water.
OR , as you mentioned, plumb in baseboard heat.
OR, if you are going to keep this place, and not just 'flip' it,, I'd install a 'staple up' pex under the flooring heated floor system.. this is the cadilac of heating systems,,you will absolutely LOVE it... however, unless you need to pull down your sheetrock [drywall] under your floors, this may be a lot of extra work. It will be well worth it.. but you may not want to tackle this..
I'm assuming, that since it is an electric heated house, that it has very good insulation and windows??