click on layer you want to duplicate effects from hit apple c, control click onlayer you want to paste to then choose paste attributes then from the list choose what you would like to paste, alternatively you could simply drag and drop the effect from your effect window once you have it set to how you like it, alternatively you could take your sequence and load it into a new sequence then drop the effect onto that this will then apply it to everything. Or you could set up a favourite effect and then simply drag and drop it form there, so many ways to choose.