Well, they had preferred weapons, but not so married to them as on TV-- I think it was Michelangelo who prepared a salad with a pair of butterfly knives. They were indeed more violent that their video incarnations, but not SUPER-violent. More like realiztic about what happens in a sword fight. They were also in living black&white, so the grue was muted. In movie terms, think Yojimbo rather than Kill Bill.
True, they weren't any more violent than they had to be, to survive or carry out their honorable sensei's request. Though I strongly suspect Raph tended to enjoy fighting more than anything.

Have to add, that the personality of Leo and Usagi are very similar: avoid violent conflict whenever possible, but when faced with no alternative, to do so without hesitation, and always with honor.
Pst-- Leo-san, it was Raph who used the butterfly swords to trim the tree, not Mikey. Yes, you can bap me for micromanaging, here....
