Fridge Logic: It wasn't necessary to get the deed. The very presence of the Weasels in Toad Hall confirms the Defense's story.
More of a meta example, but why was "Mr. Toad's Wild Ride" so scary? There's no horror in the Wind in the Willows part of the movie - all Nightmare Fuel comes from the last 5 minutes or so of the Sleepy Hollow part.
Also, just how DID Toad manage to get out of his cell unnoticed? Yes, he's Disguised in Drag, but unlike the book, there's no reason for a woman to be hanging around a prison cell.
Fridge Brilliance: The reason Toad is only FRAMED for theft is because in the 40's, there was a very strict rule that in any movie, the audience should not feel ANY sympathy for the criminal, so having him actually steal the motorcar wouldn't make him very sympathetic.
The Story of Ichabod Crane:
Fridge Logic: Crane briefly looks down the collar of the Headless Horseman, and shivers as it laughs up at him. What did he see, and what produced the laugh?