I have an ethernet connection to my Wi-Fi router. How do I find the WAP Password so I can use the Wi-Fi feature?
The easiest way to do this would be to go into your routers web based management console.
In most home networks where you haven't modified anything your router will live on either 192.168.0.1 or 192.168.1.1, try typing either of these into a web browser from the machine connected via ethernet.
If you don't get to the console with either of those you'll want to check the IP your machine is getting with the ifconfig command. Whatever your machines IP is the router is most likely that except with the last octet being a 1. IE:
eth0 Link encap:Ethernet HWaddr 00:11:d8:70:3d:29
inet addr:192.168.30.40 Bcast:192.168.0.255 Mask:255.255.255.0
inet6 addr: fe80::211:d8ff:fe70:3d29/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:2465715 errors:0 dropped:0 overruns:0 frame:0
TX packets:2639621 errors:0 dropped:0 overruns:0 carrier:0
RX bytes:1295572293 (1.2 GiB) TX bytes:305380191 (291.2 MiB)
Under "inet addr" on my first Ethernet device or "eth0" it lists 192.168.30.40 as my IP, so my router is most likely on 192.168.30.1
Once you're at the console page for your router you can either check the bottom of the physical device as companies often put default passwords and usernames on them, or try some simple combinations like admin/password admin/admin etc, or google "ModelNameOfYourRouter default password".
Once logged into the console you should be able to see some sort of wireless tab or drop down, from there you'll be able to change the authentication method and connection keys.
Hopefully that helps.