Learn English – When did “Happy ending” get used as a euphemism

EtymOnline has this:

gimp (1) 1925, "a crippled leg," also "a crippled person," perhaps by association with limp, or a corruption of gammy (see game (adj.)).

gimp (2) also gymp, ornamental material for trimming dresses, furniture, etc., 1660s, from Fr. guimpe, O.Fr. guimple "wimple, headdress, veil," from a Germanic source (cf. O.H.G. wimpal).

It agrees with your sources on etymology of gimp as a slang word and sheds some light on it's "fabric" meaning, which seems to be at least several hundred years older.

As to gimp suit, it seems to be coined in Tarantino's Pulp Fiction (Wikipedia) and is younger than both above meanings of gimp.

I'm not sure when the term "talkie" in the context of "motion picture" died out, but I have heard of the term "talkie" being used for movies that have very little action and mostly dialogue. In this context, I have heard the movie "Interview With a Vampire" being described as a "talkie".

I think the reason "Motion Picture" would be more accurate than "Film" is because the term "Film" can also refer to still pictures, like "film in the camera".

As for 3D, I have heard the term "3D Movie" used a lot here in the United States. I haven't met anyone who says "3D Film".