Well, we are about as new as they come to this (never farmed in our lives) but I will let know you what we have used in our 6 wks of bottle calves

We read 3 or 4 books and tons of articles and I keep an eye on the calf sticky on here (and still google things)
bottles
milk replacer (animal protiens, not veg min 22% protien 10% fat but 15%-20% better)
electrolyes (get the little packets and have at least 3 on hand)
iodine
bag balm
peroxide (just in case)
blood stop (just in case)
de-horning paste (unless you plan to use another method)
castrator/bands (we waited a month for both dehorning and paste and wish we would have done it at 2 wks once they got adjusted to new food,home, etc)
Things we have on had but haven't used... (we found our list in an old farm book)
rubbing alcohol
foot rot/ringworm spray
epsom salts
kaopectate
calf bolus
vicks vapor rub
asprin
benadryl
Hope it helps. Good luck!