CPU power plugs are 4 pin, 8 pin, or "4+4" pin.
GPU power plugs are 6 pin or "6+2" pin.
You cannot use one in the wrong place. They are wired differently. Using one in the wrong place will result in shorting 12 volts directly to ground. If you are lucky, the PSU will detect the short and nondestructively shut itself down. If you are unlucky, you can fry something expensive.
You have a 330 watt PSU (total average power). Any other rating ("peak" or "total" max power) is meaningless. Even so, a 330 watt PSU (if it can actually produce 330 watts) should be able to power your system.
I estimate that total PSU load on your system is around 250 watts.
Yeah, never ever use a power supply that comes with a case.
Not always true. The power supplies that some Antec cases come with are quite nice. More accurately, never buy a case/PSU combination that costs less than $70.