Muriatic acid is a historical name for hydrochloric acid. It's a very strong acid used in a variety of industrial processes. Since you say you're "naive" I would recommend staying away from it since it can be quite dangerous in concentrated form. I doubt there is anything marketed as "food...
I suppose I'm like halfway between buying on a per-recipe basis and buying in bulk. I'm an apartment brewer so I don't have the space to store pails of 55lb sacks of grain.
I basically plan out my next couple of brews, figure out what I need, and order online based on that. I try and plan...
I currently do 2.5 to 3 gallon BIAB batches on my stove. BIAB is about as simple as you can get. If you've done extract batches with steeping grains, you're most of the way there.
You probably already have a 5 gallon kettle so you're good. I've found that with grain absorption and boil-off, I...
I just bottled my first batch of this today. It was my first all grain attempt, and it ended up stronger (about 5%) since I must have been distracted and added extra 2 row.
Either way, the sample was remarkably clear and it tasted great so I can't wait for the bottles to finish conditioning.
The Oktoberfest style is a lager (also called Marzen, for March). It was brewed early in the year and stored in cellars since it was too hot to brew well in the summer. Then (from what I understand) anything left would be served at harvest festivals and the like in September/October...