Viz typically doesn't censor the Naruto manga. They respect the original content and try to keep it intact. Maybe there could be very minor tweaks, but nothing major that would change the core of the manga.
It depends on your preferences. Some people love Viz manga for its diverse range of stories and high-quality art, while others might not find it to their taste.
The app itself is free to install. However, depending on the specific manga you want to read, there could be charges for accessing certain volumes or chapters.
The value of Viz Comics can vary greatly. It often depends on factors like the title, condition, and rarity. Popular titles in good condition can fetch a decent price among collectors.