Is there any help for muggle werewolves?

Muggles can be turned into werewolves, but it’s rare.

The Pottermore entry for werewolves describes some research into werewolves:

He also learned from the werewolves that Muggles “taste” different to wizards and that they are much more likely to die of their wounds, whereas witches and wizards survive to become werewolves.

I don’t recall a canon mention of a Muggle werewolf – named werewolves are generally rare in Harry Potter canon, Muggle ones even more so. I imagine it’s unusual enough that the Ministry would treat it on a case-by-case basis (once they stop squabbling over which department should handle it). That gives the Minister of the day discretion to solve the problem as they see fit.

Given their generally low regard for Muggle welfare or way-of-life, I imagine any Muggle werewolves who survive an attack are abducted by the Ministry. Their family get obliviated to believe their relative died in a horrific wolf attack, and secrecy is maintained.

Even if werewolves don’t specifically reveal the existence of wizards, if somebody was found to be a werewolf, it might cause Muggles to start re-opening old myths. That’s unlikely to end well for the magical community.

Regarding dot three, that of wolfsbane... it is very likely the answer is no, they don't get any.

When we see Remus taking it in PoA, he mentions it is difficult, very complex, and there are few who can make it. I think he also says he would not get it if Snape hadn't made it for him, perhaps implying it was a perk of the job, but I'm less sure of that. It might be essential for werewolves to be able to work, but no one seems to be treating it as such... certainly there is no suggestion that it is being given away or subsidized simply because it is a medical necessity.

I assume it is expensive. Few can make it, that means it's complex enough to drive the price up, even if the ingredients happened to be common. Even if they somehow had someone willing to make it for free, just for the muggle-born werewolves, there's the price of the ingredients, the potions lab requirements, distribution, and a certain amount of enforcement (so other werewolves didn't sneak onto the list). I really doubt the ministry would spend money on what they would account charity. Actually, if they had someone willing to make it, they might lift some of the work restrictions, so they could get the werewolves to pay for the potion (and, profit!).

And the ministry thinks very poorly of muggles (look at the covered up crimes, and general attitude). The ministry thinks poorly of werewolves (the restrictions, the marginalization, the insults... Umbridge...). the combination is likely to be treated worse, not better. I would believe they were kidnapped and everyone else obliviated, as @alexwlchan suggested in his answer. Or imprisoned, or killed (for breaking rules they had no way of knowing about, even). I don't think they would get given extra privileges.

For dot four, if they are given support? I suspect the answer is also no, because the ministry doesn't care, see last paragraph. Also, what we see of Harry's introduction to the magical world suggests there's not a lot of emphasis on support for muggle-raised - no support center, or resources for learning more, or cultural studies, or even a suggested reading list. Harry learns a lot more through his friends, which is probably not safe for a government or a school to rely on. So, I would assume any support or introduction given to muggle werewolves would be equally brief, perhaps a little of where things are and what's expected, and they can sink or swim on their own.

As for your other questions, I'm afraid I don't know the answers - I can't even guess, from what I recall of the books. I hope you find answers, though, it's interesting now that I've thought about it.