for the easiest way create the base mesh for the dress

duplicate a loopcut to extrude for the lowest ruffle and subdivide it       then extrude it several times to make it move more like cloth

from there when you are happy with the poly count you can duplicate it and rescale to fit the next ruffle

but seeing the sheer fabrics of the ruffles you will need to seperate them by material zone and assigned color to make the difference in opacity

for the lace vertical trim an added plane with a tranparency map should work is set solid