Check out dieselgiant.com there are a lot of pictorial how to's there.
Definitely change all the filters, oil, and so forth. Do the valve adjusment, and diesel purge it until it runs smooth again. When you introduce the B100 it will de-sludge the tank and then all your filters will clog up again so have extras ready.
Nothing needs to be changed for bio. If the hoses are weak to begin with then change them but otherwise you're fine they're not going to melt overnight. I have run WVO/SVO/Biodiesel through sections of very poor rubber near the tank and it holds up fine.
Was the white smoke fuel or coolant?
Injector prices vary but the important thing is to have balanced injectors. I had all of mine rebuilt with the bosch nozzles and despite their unknown manufacture origin they run great.
Oh and by the way welcome to the forum
