is not that i want to be contradictive because i cant be. I have no experience doing this. but i am just loooking for a basic set up and that i can buy locally. I dont even have a credit card so im trying to work with what i can reach
You don't have a bank account? If you have a bank account, you have a debit card, and you can use that as a credit card. I told you the 8 gauge wiring won't work. And neither will the 6 gauge. I linked you to the 2 best wiring kits and they're probably cheaper than whatever is at best buy, and they are undoubtedly a dozen times better. You can always buy a "gift card" credit card at the local stores like Vons or CVS or Walmart and use that. Which is actually what I'd suggest doing. Because then you could buy whatever you need to online. And it'd be much better equipment.
Point of the matter is, Best Buy is one of the worst places for car audio, with mediocre prices. If you want to get decent equipment with great prices, that you won't have to replace down the road... then either use your debit card, or get a "gift card" credit card, and look at some of the equipment I've suggested.
The stuff you're asking about at Best Buy just isn't good. It's not good. It's poorly made, it sounds mediocre, and it is over priced. Even at $50 a speaker, it's just not worth money, because all it does is make noise.
If you're not open to considering something better, then just buy that stuff up and be happy with it. It will make plenty of noise and you can convince yourself it's just fine.