Memphis Car Audio - Power Reference 6-1/2" 3-Way Car Speakers (Pair) - Black

They are 2 ohm

you can speaker here or there, but I do not like speaker. I do not like speaker on a house or in a box or in a tree, not with a goat, not in the dark. I do not like speaker anywhere.

rms is 60watts per speaker

Depends on how you hook it up. If you are running off your head unit then just use the existing wires. If you are running of an amplifier then you need speaker wire. If you are hooking up an amplifier then you'd need power and remote wire in addition to the speaker wire. If you are unsure I'd watch some videos on youtube or get a professional to install it.