C-3PO was actually in all the movies but was created before episode I (1), which was the fourth movie created. The sequence in which the movies were made is: first:episode IV (4), second:episode V(5), third;episode VI (6), fourth:episode I (1), fifth:episode II(2), sixth:episode III (3).
No
C3po & r2d2
C3PO During the escape from Hoth, Han Solo referred to C3PO as the professor.
C3po is a protocol droid created by Anakin Skywalker to help his mother in communicating with others
C3PO and R2D2
C3PO during the escape from Hoth, Han Solo referred to c3po as the professor. Obi Wan was called the negotiator.
If you mean 'metal', I think you're talking about R2-D2 or C3PO, both are metal robots from the Star Wars movies.
I think you mean C3PO (see-three-p-oh)
The rarest Lego Star Wars piece is probably the 10k golden C3PO. Made out of real gold, there are very few in the world.
It's impossible to know which character was created literally first. All the characters in A New Hope appeared in 1977 but one could imply the 'first' Star Wars characters were R2D2 & C3PO along with a third unknown droid walking behind them.
Those are storm troopers(unless you're referring to R2-D2)
In the movies he doesn't say an exact number, when EV-9D9 asks C3PO:"How many languages do you speak?," C3PO answers: "I am fluent in over six million forms of communication...."Reference: Star Wars, episode V transcripts.