Clues

For the film lines you haven't guessed so far ....

#3 is a sequel featuring a lot of plastic monsters, sometimes with sparks coming out of their mouths.
Son of Godzilla circumambulate (vret and philipispdr were close)
#6 is spoken by Michael Caine, acting a German who later pretends to be British, though at this point he's still pretending to be German. It also has Jenny Agutter looking sexy and disturbed, though this is true for just about all her films, at least the ones after she entered puberty.
The Eagle Has Landed rodneyorpheus
#7, as someone guessed, is a campus comedy. It also features ghosts and a lot of illegal narcotics. A pretty stupid film, but it has a few nice lines.
How High fei_hong
#8 "Ma" as in the French for "my", not the American for "mother". A critic described this as the only film to design an entire set around a packet of Gauloise Bleu.
Diva vret
#14 The "it" in question is a sword. Should be easy now!