No, some compound prepositions are idiomatic, in the English language. An example of this would be "according to".
no it is followed by a noun or a pronoun.
TO and FOR express the order. TO goes before a verb, and FOR before a noun.
"Get" is a verb.
A preposition is a word, or group of words, that is used with a noun or pronoun to indicate a relationship to another thing. It can show place, proximity, direction, time etc. e.g. Your dinner is in...