The correct answers are He walked too loudly to scare anyone. and He wasn't quiet enough to be a good ghost.

We often use too + adjective/adverb + to-infinitive to show a negative result (e.g., too loudly to scare).

We use adjective/adverb + enough + to-infinitive to show ability or sufficiency (e.g., quiet enough to be).

"He moved enough quickly" is incorrect because enough must follow the adverb (it should be quickly enough). "He was too much transparent" is incorrect because we only use too before adjectives, not too much (it should be too transparent).