Answer:
Syntactically correct but semantically incorrect.
Explanation:
The sentence "The bicycle talked the boy into buying a candy bar" is syntactically correct but semantically incorrect. This means the sentence syntactics are correct, but the meaning makes no sense. The expression "talk someone into doing something" is correct. It means convincing someone of doing something. But a bicycle cannot do that, it's an inanimate object. A bike cant' talk nor convince anyone of doing anything. That's why the semantics of the sentence are incorrect.