No.
OK, I repeat what you need. Just go and get them. If you have them
already, don't need to buy.
First thing, a router.
This is a router. 
A router will have antenna, because of its wireless features. And
if you are unsure what you have is a router or modem, go dig out
your receipt.
Next, an ethernet card.
This is an ethernet card. 
Look behind your CPU. If you have this hole behind, that means you
have this card. Otherwise, you need.
RJ45 cable is provided when you buy a router.
If your house has more than 2 computers, you will need a wireless
adapter.
Most will prefer to use USB wireless adapter. 
If you want, can use wireless card as well. 
For a laptop, you will be using a wireless card. 
