I'm adding this as an answer as there was not enough space in the comments.
"You all know that on the night I lost my powers and my body, I tried to kill him. His mother died in the attempt to save him - and unwittingly provided him with a protection I admit I had not foreseen.... I could not touch the boy. His mother left upon him the traces of her sacrifice... This is old magic, I should have remembered it, I was foolish to overlook it.... but no matter. I can touch him now.
I wanted the blood of the one who stripped me of power thirteen years ago... for the lingering protection his mother once gave him would then reside in my veins too...
-- Harry Potter and the Goblet of Fire - Chapter Thirty Three: The Death Eaters
So, Voldemort took Harry's blood believing that the protection that Lily left for Harry would reside in his veins too -- he is satisfied that just by being able to touch Harry - he has gained the powers of his mother's protection.
"He said my blood would make him stronger than if he's used anybody else's" Harry told Dumbledore. "He said that the protection my- my mother left in me - he'd have it too. And he was right - he could touch me without hurting himself, he touched my face".
For a fleeting instant, Harry thought he saw a gleam of something like triumph in Dumbledore's eyes. But next second Harry was sure he had imagined it, for when Dumbledore had returned to his seat behind the desk, he looked as old and weary as Harry had ever seen him.
"Very well", he said, sitting down again. "Voldemort has overcome that particular barrier."
-- Harry Potter and the Goblet of Fire - Chapter Thirty Six - The Parting of the Ways.
That which Voldemort does not value, he takes no trouble to comprehend. Of house-elves and children’s tales, of love, loyalty, and innocence, Voldemort knows and understands nothing. Nothing. That they all have a power beyond his own, a power beyond the reach of any magic, is a truth he has never grasped. He took your blood believing it would strengthen him.
-- Harry Potter and the Deathly Hallows - King's Cross.
From both the quotes, Dumbledore makes it clear that Voldemort had misunderstood how the protection left by Lily works. Instead of making Voldemort stronger - the fact that Harry's blood runs in Voldemort actually made Harry stronger. Voldemort could not kill Harry as long as Harry's blood was running in his own body.
I believe that Lily's enchantments never worked for Voldemort - because they were never intended to. And this is evident from the fact that Voldemort did not survive in the end.
As for the questions asked:
1) Lily's enchantment contingent upon Harry living with Petunia Dursley - as others have pointed out, it wasn't Lily's enchantment but ones Dumbledore had placed upon the Dursley's when he trusted Harry to be with Lily's blood relatives.
2) The blood bond between Voldemort and Harry was limited to the fact that Voldemort rebuilt his body from Harry's blood. It only gave another living body to add to Harry's protection. Harry was tethered to life while Voldemort lives.
3) Again - from Harry Potter and the Half-Blood Prince, Chapter three - Will and Won't:
The magic I evoked fifteen years ago means that Harry has powerful protection while he can still call this house 'home'.
That shows that only Dumbledore's will break when Harry turned seventeen.
4) When Dumbledore speaks of love in the Order of Phoenix - I do not believe he was referring to Lily's love. I believe he was referring to Harry's ability to love. Harry's love for the people closest to him was so strong that he would do anything for the one's he loved - as is evident by his rush to save Sirius.
"There is a room in the Department of Mysteries," interrupted Dumbledore, "that is kept locked at all times. It contains a force that is at once more wonderful and more terrible than death, than human intelligence, than the forces of nature. It is also, perhaps, the most mysterious of the many subjects for study that reside here. It is the power held within that room that you possess in such quantities and which Voldemort has not at all. That power took you to save Sirius tonight. That power also saved you from possession by Voldemort, because he could not bear to reside in a body so full of the force he detests. In the end, it mattered not that you could not close your mind. It was your heart that saved you".
-- Harry Potter and the Order of the Phoenix - Chapter Thirty Seven - The Lost Prophecy
Also - going back to the first book:
"Your mother tried to save you. If there is one thing Voldemort cannot understand, it is love. He didn't realize that love as powerful as your mother's for you leaves its own mark. Not a scat, no visible sign... to have been loved so deeply, even though the person who loved us is gone, will give us some protection forever. It is in your very skin. Quirrell, full of hatred, greed and ambition, sharing his soul with Voldemort, could not touch you for this reason. It was agony to touch a person marked by something so good."
-- Harry Potter and the Sorcerer's Stone. Chapter Seventeen: The Man with the Two Faces.
It was Lily's love that resided in Harry's blood. And Voldemort seems to have overcome that problem by using the blood to regenerate his body - as Dumbledore noted. But it was Harry's love for others (Not Lily's love for Harry) that made it impossible for Voldemort to possess Harry.