Minecarts of all types seem to drop Minecarts named with their entity names. The Furnaces, Chests, ect. drop as normal with normal names.

When broken a Minecart drops a minecart named "entity.MincartRideable.name".

A Minecart with TNT drops a Minecart named "entity.MinecartTNT.name" and TNT.

A Minecart with Chest drops a Minecart named "Minecart with Chest" and a Chest.

A Minecart with Furnace drops a Minecart named "entity.MinecartFurnace.name" and a Furnace.

A Minecart with Hopper drops a Minecart named "Minecart with Hopper" and a Hopper.