I checked out mrmalty (excellent resource btw) and for 6 gallons of 1.062 Lager wort, with a stir plate, it says to use 2 packs/vials of culture to make 2.7L. of starter. Is it ok to use 1 pack and ramp up? Also when should I add the additional wort? Finally, is it OK to use a drop of fermcap in a gallon of starter wort?
you certainly can use 1 and step up - you'll just need to weigh the time/cost benefit of going through the steps - sometimes for me, its easier to buy 2 vials and do one starter.
I recommend doing the first step to completion (24-48 hours if using a stir plate) chilling and decanting and then adding fresh wort.
You can kinda work backwards with the mrmalty calculator - for your 1.062 Lager you need ~520bn cells, so if you wanted to do a two step off one very fresh vial and keep the starter sizes less than 2L (I don't know what size your flasks are - making an assumption here), you'll need to grow the first step to about 275 bn cells, so your first step would be 1 vial: 1.5L starter, and the second (after crashing/decanting): 2L on the slurry.
Hope that helps.
Fermcap is okay AFAIK.