Well, it depends on the specific fanfic. Some fanfics might really emphasize Naruto's growth to be on par with Minato in terms of smarts. They could show Naruto learning from Minato's memories or having some sort of spiritual connection that transfers knowledge. However, other fanfics might focus more on other aspects of Naruto's character and not necessarily make him as smart as Minato.
I don't know the specific name of the Minato manga off the top of my head. It could be related to a particular genre or have some distinctive features that might help identify it.
If Minato survived, it might lead to a power balance shift in the ninja world. His presence could prevent some of the later conflicts or handle them differently. Also, his relationship with his family and friends would evolve in interesting directions.
Sorry, I don't have that information. Usually, such release dates are made public closer to the actual release time. Keep tabs on relevant manga news websites or forums for the most current details.
Well, the length of Minato manga could vary. It might continue for a few more volumes or maybe wrap up sooner depending on how the plot progresses and the popularity among readers.