The second generation is Harry Potter and his friends, since the first generation (that is featured) is James Potter and the others. But if you want to know the generation after Harry, it's his children and their friends.
Hogwarts students.
People
Students are classified by their year of study. There are seven years at Hogwarts, named first year, second year etc. Students study their O.W.L's from their third to fifth year and their N.E.W.T's in fifth and seventh year.
No. Care Of Magical Creatures is an elective that Hogwarts students can take in second year, along with Divination or Ancient Runes.
No, the students don't need to have "Hogwarts: A History". It's not on the equipment list of the students, but it's available in the library of Hogwarts.
second generation students
Young witches and wizards.
Fifth year students at Hogwarts are fifteen years old. Most students will turn sixteen throughout the school year.
It's unknown. Enough to take all the students to Hogwarts.
The school's Head Master
Yes infact hogwarts students are required to wear uniforms all day long even quittich matchs. they have quittich uniforms too
Young witches and wizards attend Hogwarts to learn how to control their magic and train in wizardy.