For a sword fight you're best off making your own sound effects. You'll find that a real sword fight sounds dull and quite lifeless. These are always dubbed with better sound in the movies to get that lovely twang sound.

Take a microphone out and find a nice solid metal railing by the side of some steps somewhere. The sort of thing skaters love to 'grind' (apologies for knowing this lingo!). The just hit it with different objects (sticks, stones and other bits of metal) to get different variations. You'll get a much 'better' swiord sound from that than you ever would from a real sword. Quite an irony eh?

Flying off screen? You mean like superman? Best done as bluescreen.

Fire? Use a particle system like Combustion, After Effects or (my personal fave) Particle Illusion.

__________________
I'm not young enough to know everything!