The first one reminds me of a (double) episode of “Outer Limits” (“The Origin of Species” with Ryan Reynolds).
Its close however aspects of the episode differ from what I recollect.
Second one sounds like “Jason and the Argonauts” (or a variation there-of), the most prominent being the 1963 version, featuring special effects by Ray Harryhausen.
Although the description I provided is somewhat reminiscent of the children of the hydras teeth they're not said creatures, sorry.
Third seems a tough nut, although something in the subconscious rings a bell. Right, sure it’s not Disney’s “Pinocchio”, and most likely NOT “The Adventures of Baron Munchausen” (where the hero escapes by blowing snuff into the blow-hole). Have you any idea, whether this was a Hollywood- or European production? (Italy or France perhaps?)
Although I recollect the film being of the english language I can no longer remember whenever or not it was a dub. Having said this I have doubts it was funded by any Hollywood studio.