It's not a matter of better or worse. If you have the patience for static images and lots of text, start with the manga. But if you want immediate action and sound, go for the anime. You can always enjoy both in any order.
The first vampire manga he had read before was Cross and the Vampire. This manga was about a young girl who accidentally became a vampire and fought against vampires to protect herself and the people around her. The story was full of suspense and love elements, and the plot was full of ups and downs, which was very popular among readers.
Well, it's a personal choice. Some people prefer to read the manga first to get all the details and build their own imagination. Others like the surprise and fluidity of experiencing the anime first. So, there's no hard and fast rule.
Well, it can be beneficial to read the manga before. You get to experience the creator's vision in its purest form and build your own mental images of the characters and scenes. But it's not a must.
Not really. You can enjoy the movie on its own without having read the manga. The movie tells a compelling story that's accessible to viewers regardless.
I think it's a personal choice. If you want to get all the details and have more time to immerse yourself in the world, start with the manga. But if you prefer the visual and auditory experience, the anime can be a great first step.