One great place is Barnes & Noble. They have a large collection of graphic novels and it's easy to find the DC Red Robin one either in the store or on their website.
It's not a straightforward yes or no. Different DC Comics story arcs might present Robin in various ways regarding sexuality. Sometimes it's left ambiguous to allow for different reader interpretations.
The age of Robin in DC Comics isn't fixed. Different story arcs and reboots present him at different ages. Generally, though, he's often shown as a young adult or a teenager in his mid to late teens.
Robin's death in DC Comics varies depending on the specific storyline. Sometimes, it's due to a powerful villain's attack or a risky mission gone wrong.
Not that I'm aware of. Usually, the popular and mainstream DC comic characters are pretty familiar, and Red isn't among them. It could potentially be a very niche or newly introduced character that hasn't gained much popularity yet.
I don't think so. To the best of my knowledge, Red has no significant presence or role in DC Comics. DC has a vast array of characters, but Red isn't among them.