Most laptops today come with an integrated wireless card. If you do need a separate one, PCMCIA or USB wireless adapters are available starting at $10-$20.
The cost will be about $200. The wireless router will cost around $100 and each wireless adapter will cost around $25.
Wireless adapter cards do not cost a monthly fee, all the adapter does it connect to your wireless home network and allows you to access the internet.
Any wireless cards that support Wireless-N will support Wireless-G. However cards that support Wireless-G will not necessarily support Wireless-N
Most wireless cards support Wireless-N these days, but make sure you're buying Draft 2.0 N cards.
About £20
That's really not enough information for a complete answer. If all you need is a pair of PC wireless cards, it may be less than $50. If you need more or other hardware it will be more expensive.
it cost 250 bucks men
$250,000
It depends on what kind of cards they are.
The Cost depends on your wireless phone provider as well as your plan
The cost associated to go wireless will depend on many factors inclduing how many computers will be on the network.
$139.00