As everyone knows all toon monsters state they cant attack the "turn" they are summoned but my question is what if u had a f/d Pyro Clock of destiny and activated it after the toon was summoned, since pyro clock would move the turn count forward by one would the toon then be able to attack?

Pyroclock doesn't work that way. It just moves the turn count ahead 1 turn it doesn't actually make it the next turn. Pyro Clock of Destiny only works with a handful of cards.

-Swords of Revealing Light
-Final Countdown
etc. that count turns NOT PHASES

I ran one in my final countdown deck to shave off my opponents tenth turn other then that I can't see much use for the card.

pyro clock increase turn counts by 1, so it only works on cards that count turns. how many cards count turns? last i checked 3

swords of revealing light
lightforce sword
final countdown

no other cards count turns.

toons don't count turns, they don't say "this card cannot atk for 1 turn after it is summoned" it says it can't atk the same turn it is summoned.

pyro clock effects the turn count, not the turn. even though the turn count increased, its still the same turn.

other cards, like swords of concealing light count standby phases, or other phases, phases are not turns, so pyro clock doesn't effect this.

the moth cards, almost count turns, but not quite, they say things like 4th turn, or 6th turn, this still refers to a specific turn, like the toons, pyro clock doesn't change what turn it is. if the moths said they could be summoned if larva moth was equipped with the cocoon for 4 turns, or for 6 turns, etc. then pyro clock would probably work on them.

but currently only the 3 mentioned cards count turns and are effected by pyro clock.

PYRO CLOCK OF DESTINY
You can only use "Pyro Clock of Destiny" to advance the turn count by 1 for "Swords of Revealing Light", "Lightforce Sword", or "Final Countdown".

Thats from the upper deck site.