I take it that the sense you have in mind is what would be expressed most simply as
He does not intend to marry.
Sentence 1 will not bear this sense: to have an intention for something means to intend to do something with it. Thank you for the award. My intention for it is to fund a new research project. He has intentions for his daughter: he wants to see that she gets a professional education.
Sentence 2 is acceptable, but rather old-fashioned. Today we would be more likely to say
He has no intention of marrying.
Purpose and intention mean somewhat different things: your intention is, generally, what you are trying to do, while your purpose is what you hope to achieve by doing it. Accordingly, you can't really substitute purpose for intention in the same context. And to speak of someone having no purpose generally means exactly that—
He has no purpose in life.
He has no purpose in courting her, he’s just fooling around for lack of anything better to do.
When we want to deny a specific purpose, it will usually be in the context of specific actions. For instance, you observe that a man is paying court to a woman and say
[He is courting Sarah, but] marriage is not his purpose. [He's just trying to make Polly jealous.]
[He is courting Sarah, but] his purpose is not to marry her. [He wants to learn her father's secrets.]
[He is courting Sarah, but] not with the purpose of marriage. [He intends to steal her diamonds.]
You can also say
[He is courting Sarah, but] has no purpose to marry her. [The cad!]
But this, again, is very old-fashioned.
As for the sentence you quote:
... the permit had not been modified from its original purpose which was for a minimum use driveway ...
This is an awkward sentence; but the for really belongs not to purpose but to permit. The writer has compressed two different ways of expressing the idea:
The original permit was for a minimum use driveway.
The purpose of the original permit was to license construction of a minimum use driveway.