Naruto would probably be initially shocked and on guard. He's used to all kinds of strange things in his world, but a Fem Predator would be something entirely new. He might try to talk to her first, asking who she is and what she wants. If she showed any signs of aggression, he'd be ready to fight, using his Rasengan or other jutsu. But if she seemed peaceful, Naruto would be curious and want to learn more about her, maybe even offer her some ramen to break the ice.
Naruto would probably be very curious. He's always open to new things and new people. He'd likely ask her a ton of questions about where she's from and what she can do.
Naruto would probably be very confused at first. He trusts Sasuke, even if it's a Fem Sasuke in this fanfiction, and he wouldn't expect to be kidnapped by her. So, his initial reaction might be to try and talk to her, asking her why she's doing this.
The villagers' reaction would be mixed. Some would be in awe of Fem Kyuubi's power and her act of saving Naruto. They would see her as a hero and start to change their views on the Kyuubi in general. However, there would also be those who are still fearful. They might think that Fem Kyuubi has some ulterior motives and be suspicious of her. Naruto's friends from his ninja team, like Shikamaru and Choji, would probably be more accepting. They would welcome Fem Kyuubi as long as she proves to be on Naruto's side and doesn't cause any trouble for the village.
He might also try to reason with her. Naruto has a big heart and he would likely want to understand her feelings. He could say things like 'We're friends, we don't need to be this way.' He'd try to get her to see that her possessiveness is not healthy for either of them.
Naruto would probably be very confused at first. He's always seen the Akatsuki as the enemy, so being taken there by Fem Itachi would be quite a shock. He might be on guard and constantly looking for a way to escape.
He'd probably be super surprised. I mean, seeing yourself as the opposite sex is not something that happens every day. He might blurt out something like 'Who are you? You look like me!' and then start to realize the situation. He could be a bit embarrassed too, especially if female Naruto had some different mannerisms or ways of dressing.
The ninja world would be quite shocked at first. Naruto is from Konoha and has his own set of friends and allies. Fem Itachi was part of the Uchiha clan. Their marriage would be seen as an unexpected union. Some might be skeptical, thinking it was a political move. But those who know Naruto well would understand that it's probably based on true feelings. Konoha's villagers might initially be worried about how Fem Itachi would fit into the village, but Naruto's influence could help her gain acceptance.
Sakura would probably be quite shocked at first. She has had feelings for Sasuke for a long time, so seeing him want to marry Fem Naruto would be a big blow. Naruto himself (in his male form in the story's context) would likely be supportive as he values Sasuke as a friend and would want him to be happy. Kakashi would be more of a neutral observer, but would also ensure that the relationship doesn't cause any unrest in the village.
Naruto would likely be initially shocked. He has always considered the Kyubii as a part of him and a friend in some ways. So the betrayal would be a huge blow to his sense of trust.
They would probably be horrified. The Dursleys have always despised magic and those associated with it. Teddy, being a young wizard, would represent everything they dislike. They might try to shoo him away or call the police, thinking he's some sort of freak.