(From a guy who recently got mastery 5 talon, and has a ton of fun w/ talon even though i know im far from the best w/ him)
Avoid when his W comes back to you, to avoid the slow and chance for him to bleed you w/ his passive, be very careful of his level 2-3 all in because its one of the strongest in the game.
Build some HP/armor if at all possible, makes you harder to burst.
as for ganking him, have your jg use scrying plants to clear out any wards so he can't see him coming, also early-game the cooldown on each piece of terrain he jumps is very high, so having your JG pay a visit to the lane can be hugely helpful b/c it can force talon to jump the river wall on 1 side, and then your JG can return gank if talon is around that same side.
Also CC is huge vs talon, stuns and snares make him unable to jump on you or another squishy and also prevent him from running away w/ ult/parkour.
As far as later game goes, If you are a squishy DONT GO INTO FOG OF WAR ALONE/ position near teammates w/ peel, because once he has 1-2 items (especially after more) talon can easily insta-gib any squishy mage/adc, but if your team can stick together he will mainly only be able to throw W's into the fight because jumping into the whole enemy team would probably be certain death if they react correctly to him (talon is squishy too).