By 'you' you mean Harry Potter and his friends? The very first one.
Visit the nearest bookshop, will you.
Harry Potter is a fictional character in the novels, Daniel Radcliffe just plays the character in the movies. Daniel Radcliffe cannot visit himself.
It is 7,981,000.
Hagrid have Harry his owl, Hedwig, at their first visit to Diagon Alley.
Harry witnesses a burning day, when Fawkes rises again and he talked to the Sorting Hat, worried that it may have put him in the wrong house.
For any issues/errors you see in the Harry Potter books, visit mugglenet.com. They have a list of errors made in the books.
If you visit the Warner Brothers shop on WarnerBrothers.com, you can buy replicas of money seen in the Harry Potter films, but it's fairly expensive.
None of the Harry Potter books are available online. You can order them from Amazon.com, BN.com, or visit your local bookstore. If you are trying to read them for free, I suggest a visit to your local library.
After Harry Potter and the Chamber of Secrets Harry returns to the Dursleys for the summer holidays. We pick back up with him in Harry Potter and the Chamber of Secrets when he is still at the Dursleys house.
He believes he will find some answers there.
No hogwarts is not real. It is simply a scene from harry potter.
When Voldermort kills the teacher of muggle studies at the start. When harry and hermione visit the go back to the old ladies house after seeing James's and Lily's graves.