Take a deep breath and confront each mysterious/unfathomable tool one at a time. Some of the stuff is necessary and some is superfluous - only you can decide which fits your needs/goals, and those goals may well change as you progress in the hobby so don't throw/give/sell anything away.
If you're new to this I would suggest getting Barsness's books and digesting them, plus several good loading manuals. The Lyman manual has lots of good technical dope that's easy to understand, as well as load data. If you're not new to this, the advice still stands.
