Alright, all my hardware is here...almost.
I have bought:
Two 12" subs
Two Rear 6.5"
Two Front 3"
Two 4"
One headunit (already connected to stock wiring)
One 800watt amp
One 400watt amp with EQ
I have bought no wiring or additional equip yet.
Opinionize to me on what wiring I should buy

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I have not bought a box for the subs either, as I do not know what the difference between the types are. Slot-port is obvious, I get that one hah

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I'm kinda-sorta new at car audio so:
What and how is the most optimal way to connect the Amp's to the battery, and what equip do I need to buy to do it. Also, how should I run the wiring though the car to the Amp (in trunk).
What ways are optimal to wire my car speakers (3", 6.5") to the headunit.
What would be the best way to wire the two subs to the 800 watt amp?
Extras:
I have the 4" pair of speakers left over at my disposal, so what mods or placement in the car should I put them. I am thinking of buying another 3" or 4" pair to even it out, so that I can also use the 400watt amp that is also at my disposal.
This is all going to be done on a Gen. 2 1989 Camry (I'm sure though that some info may be generalized across all Gen's or cars.)
Any car-audio or expertise would be greatly appreciated!