This soup is very hot; I can't drink it.
This soup is too hot (for me) to drink.
That's a lot of money; a book like that shouldn't cost so much.
That's too much money for a book like that.
*Expect the mistake :
This soup is too hot for me to drink it.
The infinitive, even of a transitive verb, has no object if this would represent the same person or thing as the subject of the main verb, be, seem, etc.
Enough. Whereas too has a negative sense, enough, also with infinitive, has positive sense.
Compare :
He is too ill to need a doctor.
= He is so ill that it's useless to send for a doctor.
He is ill enough to need a doctor.
= He is so ill that we must send for a doctor at once.
Enough comes in front of a noun and after an adjective or adverb.