The movies do not tell why the Dwarves are hated in The Hobbit and The Hobbit DoS. However, it is believed that past wars and experiences are the reason the Dwarves are hated.
The dwarves are Bilbo's friends for most of the Hobbit.
Shelob is not mentioned in The Hobbit. Shelob is later explained to have spawned the creatures that lived in Mirkwood. They are the ones that caught the Dwarves and would have eaten them if Bilbo hadn't rescued them.
Dwarves are slightly bigger
13.
they are impatient
mails and weapons
The dwarves are happy because they are treated well with great houses.
They dwarves and the hobbit hear the Wargs howling.
Which book, which part? There could be several answers, you haven't provided enough info. The first thing that comes to mind are the eagles from the Hobbit ... but there's no way to tell without more info.Gandalf came to their rescue in Chapter 4 using "Glamdring the Foehammer."
yes
Their treasure back.