The scrolls might contain special jutsu. Maybe his mother was a great ninja with unique techniques that she recorded in those scrolls. Naruto could learn powerful moves from them, which would help him in battles against tough opponents.
At first, Naruto might be a bit hesitant. He's not used to having something so personal from his parents. But then, his curiosity would get the better of him, and he would slowly unroll the scrolls, his hands trembling slightly as he realizes that he's about to learn things he has always dreamed of knowing about his parents.
He might discover a new type of chakra control method. His mother could have been an expert in chakra manipulation, and the scrolls could hold the key to a more advanced or unique way of using chakra, which would be a great asset for Naruto.
In the fanfiction, the scrolls could reveal a lot. For example, they might disclose the circumstances of Naruto's birth. Maybe there are prophecies written in them about Naruto's future. There could be stories of his parents' love and how they made sacrifices for the village and for Naruto. It could also be that the scrolls contain some sort of training method that was unique to his family, which would help Naruto become even stronger as a ninja.
Well, if we look at the 'Naruto gets his parents back fanfiction', Naruto's character development might take a different turn. Instead of relying solely on his friends and mentors like Iruka and Kakashi, he'd have his parents' direct guidance. His father, Minato, could train him in advanced ninjutsu. His mother, Kushina, could give him all the motherly love and care he was deprived of. This would likely make Naruto more confident and perhaps a bit more relaxed as he wouldn't have that deep - seated longing for family anymore.
One possible start for the 'Naruto gets his parents back fanfiction' is that there is a discovery in an ancient scroll. The scroll contains a spell that can bring the dead back under certain conditions. Naruto, being the curious and determined ninja he is, decides to try it out. Or perhaps, in a different dimension, Naruto's parents are still alive and through some strange portal or rift, they are able to return to the Naruto world.
In this type of fanfiction, Naruto could have a different attitude towards authority. As his parents are neglecting him, he might not have that natural respect for figures of power. He may question the village's system more. Also, his dreams of becoming Hokage could take on a new meaning. Instead of just seeking recognition, it could be a way for him to create a family - a village where no one is neglected like he was by his parents.
His emotional side would be deeply affected. He might be more guarded and less likely to show his true feelings easily. He would see the world in a more cynical way at first. But as he grows, he could use his experiences to become more empathetic towards others who are also alone or neglected. For instance, he could start reaching out to orphaned kids in the village. His journey to becoming Hokage would also be different. Instead of having the typical family - inspired motivation, it could be a way to rewrite the story of neglect in his own life and in the village.
He would probably be overjoyed. Harry has always longed for a connection with his parents. Getting their portraits would be like getting a part of them back. He might just stand there, staring at the portraits with a big smile on his face, unable to take his eyes off them.
Emotionally, Naruto would have to deal with a whole new set of family relationships. He grew up without his parents, and now having them back would be a huge adjustment. He might struggle to fit into a 'normal' family dynamic, and there could be some friction as they all get to know each other again.