What Wifi Cards Do Mac Pro 2008 model use???

Hello all, just got my first mac pro ,I usually deal with PC's so this is new for me I wanted to ask which type of cards would I need to get my mac pro blue tooth and wifi compatible and I want to know which is the best graphics card available for this machine , please let me know thanks!!!😕

Essentials

Family: Mac Pro

Codename: ?

Gestalt ID: 406

Minimum OS: 10.4.7

Maximum OS: 10.7.3

Introduced: August 2006

Terminated: January 2008

Processor

CPU: Intel Xeon 5100 Series ("Woodcrest")

CPU Speed: 2x2.6 GHz (dual-core)

CPU Cores: 2

FPU: integrated

Bus Speed: 1.33 GHz

Register Width: 64-bit

Data Bus Width: 64-bit

Address Bus Width: 64-bit

ROM: EFI

RAM Type: DDR2 FB-DIMM

Minimum RAM Speed: 667 MHz

Onboard RAM: 0 MB

RAM slots: 8

Maximum RAM: 16 GB

Level 1 Cache: 32 kB data, 32 kB instruction

Level 2 Cache: 4 MB on-processor

Expansion Slots: 3x 16-lane PCI Express

Video

GPU: Nvidia GeForce 7300GT (16-lane double-wide PCI Express slot)

VRAM: 256 MB <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<Whats the highest I can put here???????

Max Resolution: all resolutions supported

Video Out: DVI (dual link)

Networking

Modem: optional external 56 kbps

Ethernet: 2x 10/100/1000Base-T

Airport Extreme: optional <<<<<<<<<<<<<<<<<<<<<<<<<<which one i search and keep getting the G5 one, can I use that one on this?

Bluetooth: optional 2.0+EDR