Looking at each end of the core/stack the windings look like they are OK with shellac on them. The bit that is pinkish indicates to me where the main heat source was and that all the shellac is missing. Either side is black from charring which also indicates that the integrity of the shellac insulation is doubtful.
I would suspect several of the windings are now shorted. Any attempt to run it up again is more likely to result in further overheating and is it really wise from a safety aspect to do this?
These things happen and sadly it looks like the transformer is not viably worth saving.
