It depends on the specific context and the author's intentions. Sometimes, it might be considered canon, but without more details, it's hard to say for sure.
I'm not entirely sure about the very specific 'real story' of Kars for Kids. But generally, it's an organization that is known for collecting car donations. It uses the funds from these donations for various children - related causes, like providing educational support or care for children in need.
Sukuna does die in the manga. The way it happens is quite dramatic and ties in with many other elements of the story, adding depth and tension to the overall narrative.
In the novel, Lil Shou was originally a human on Earth, but under some unexpected circumstances, he transmigrated to an interstellar world and became a member of a race called the Carl people. In this world, the people of Karl were usually described as cute creatures. In order to integrate into this world, they began to imitate the appearance and behavior of the people of Karl to adapt to this world. Sometimes, he would show the unique gentleness, kindness, and innocence of the people of Karl and establish a special relationship with them.
I'm not entirely sure as I haven't read it specifically. But generally, a light novel often has a unique story line, perhaps with complex characters and an interesting world - building. It might involve the adventures of the characters, their growth, and the challenges they face in the world of 'ultimate kars'.
No. Ryomen Sukuna is a fictional character from Japanese mythology and modern manga/anime. He doesn't have a basis in a true historical event or person.
Nope. Ryomen Sukuna has no basis in reality. It's a product of the creative minds of the writers and illustrators who designed a captivating fictional character for the enjoyment of the audience.