Wireless access points simply connect to an existing network via a network port and can typically be set up for fixed IP or DHCP - ie from the router depending on the existing network configuration.
All you're basically doing with a wireless access point is expanding the coverage as that's all they do. You fall out of range of one unit and your laptop simply hot-jumps to another access point. If you drive along and a mobile phone is in use (hopefully not by you if you're driving

) when the phone falls out of the range of one transmitter it logs onto the nearest one. It's the same idea.
The IP you need depends on the current configuration. Now we cannot answer that, however if the access point doesn't get an IP on its own it means the network is static and you'll need to assign it one depending on the range chosen and what numbers have already gone.
MAC addresses may be needed to add to the router's list if such an option is already in use otherwise it won't connect no matter what you do.
SSID - for the hot-jump it would need to be the same as the existing access points otherwise it defeats the whole point of having them.
SSID Broadcast disabled can be more secure but you need to know it's there before it'll connect. Easier to leave it on.