He does not feel brave although he does get refreshed from the elves
Bilbo put the dwarves in barrels, and the elves float them down the river with out noticing.
Bilbo slipped on the ring and was invisible.
Until the end of The Return of the King, when he went to the Undying Lands with the elves and Frodo.
as Bilbo was wanting to make peace so there is no war
Bilbo stood with the elves for two reasons. They had made their stand on Ravenhill and there was more of a chance of escape from that spot. And because if there was going to be a last stand he preferred to defend the Elvenking.
Bilbo met the Dwarves in Chapter 1. He met Trolls in Chapter 2. He met the elves of Elrond's house in Chapter 3. These would have been mostly Noldorin elves, but Sindarin elves and Sylvan elves would have been present also.
No. Bilbo Baggins did not die; he, Frodo and the rest of the Ring-bearers went with the elves into the Undying-Lands. Undying = does not die.
No, elves do not eat hobbits. Orcs might eat hobbits, but not elves. When the dwarves and Bilbo have a reception at Lord Elrond's home, it is seen that the elves serve them a strictly vegetarian meal. Maybe an indication that Elves are herbivores
Bilbo knows his sword was made by the Elves because Gandalf told him when he found it in the cave. Gandalf gave it to the Hobbit in case he ever needed to defend himself on his own.