If you want to play red cards in Commander, you're going to need to get a copy of Dockside Extortionist unless you're fine with just not being competitive
Back then just having the appropriate equipment was enough to win a lot of games and so Stoneforge being an extra copy in your deck of one of those combined with being a Squire to equip was pretty absurd
They don't copy whether that creature was tapped or untapped, whether it had any counters on it, whether it had any Auras and/or Equipment attached to it, or any non-copy effects that changed its power, toughness, types, color, and so on
When deciding which green ramp cards to play in your decks, you should consider two factors: cost and synergy
If an opponent sacrifices a nontoken permanent, it doesn't matter which graveyard it goes to