To change your IP address via command line, use the following command:
netsh interface ipv4 set address "Local Area Connection" static 192.168.0.100 255.255.255.0 192.168.0.1 1
192.168.0.100 is your IP address
255.255.255.0 is your netmask
192.168.0.1 is your gateway
To also change your DNS server, use the following command:
netsh interface ipv4 set dnsservers "Local Area Connection" static 192.168.0.1
192.168.0.1 is the IP address of your DNS server
These commands have to be used from an elevated command prompt (start as Administrator).
However, if you lack the permissions to change the settings via the GUI, these commands also might not work.