True
wargs
The wargs speak a different language from the spiders and Bilbo.
Wargs. They are slightly larger and can speak.
You answered your own question. They are called Wargs. They are, in other words, the wild wolves of the mountains.
The wargs were unable to get them out. However, the goblins were able to redirect the fire and were in the process of burning them out.
wargs
Orcs and Wargs. It doesn't say the Wargs kill themselves but they do eat the orcs.
They are called Fell Beasts and they are most definitely not dragons. Dragons do exist in Tolkien's universe and are in no way related to Fell Beasts.
the lord of the eagles, and somewhat gandalf
In "The Hobbit or There and Back Again", the party is traveling through the forest when they hear wolves. They scurry up the surrounding trees and the Wargs rush in. This happens to be their "Meeting Place" with the goblins. The party is trapped in the trees with furious Wargs and Goblins beneath them.
The whole party had to climb up and hide in trees beside the clearing while the wargs came and tried to kill them. Gandalf, who specialises in fire had to burn them to death until the remaining wargs retreated.
A warg as refered to in The Hobbit is a particularly evil type of wolf. Wargs and goblins often help each other with wicked deeds.Wargs, especially those of the Hobbit, were known to speak in their own language, and so they were sentient beasts, like the crow Roac and the Thrush. There is not too much description about the Wargs in Tolkien's works besides the fact that they were like wolves (often called by that name as well). However, it is interesting to note that a spell Gandalf one time uses in LOTR, when translated, calls the attacking Wargs "ngaurhoth" (werewolves). Thus, it is possible that the Wargs of The Hobbit and The Lord of the Rings were the werewolves referred to in Tolkien's Silmarillion.