Every fan?
Well, as in the second part you mention case fans, i presume you're just talking about internal fans:
1x HSF fan (the fan to go on the heatsink on your processor)
1x GPU fan (the fan attatched to your graphics card)
1x PSU fan (the fan inside your power supple unit)
1x Chipset fan (optional. a fan for the chipset on your motherboard)
1x Front mounted intake fan (most cases have a little section at the front-bottom of your case for a fan to intake cold air. Put an 80mm here)
As for additional case fans, well i've got 6 in my case but DO NOT FOLLOW ME UNLESS YOU WANT A PC THAT SOUNDS LIKE A JET TAKING OFF!!!. If this is your first rig, and are not going to overclock/overclock minimally, you probably won't need any extra fans. If you want to overclock a lot, you can fit in several and eventually more high power ones. I would recommend, when you finally decide to add in more fans:
1x 80mm fan on the side of the case, intake, blowing cold air onto your motherboard (mobo). This should be placed lower down.
1x top mounted 80mm high-power fan on the top of your case as exhaust, sucking the hot air out. This should be about half way along, slightly to the back. However, these mods require cutting into your case with something like a dremal. This is not recommended until you know what you're doing.
Componants checklist:
* CPU (processor)
* HSF (heatsink and fan for processor)
* HDD (hard drive)
* FDD (floppy drive)
* optical drive (cd-rom, cd-rw, dvd-rom, etc)
* PSU (power supply unit)
* RAM (memory)
* Graphics card
* Sound card
* modem (optional)
* NIC (network adapter, optional)
* Case
* IDE/FDD cables
* mobo (motherboard)
Gook luck with your first build, and welcome to the forums!
ArBiTaL24.