By default if UI is not available then weblogic installer will switch to command line mode and you can provide the inputs interactively else you can provide the reponse file as below for completely silent install.
java -jar wls_generic10.3.6.jar -Djava.io.tmpDir=/path/to/custom/tmp/dir -mode=silent -silent_xml=path_to_silent.xml
-------------------------------SILENT.XML--------------------------------------------------------
<bea-installer>
<input-fields>
<data-value name="BEAHOME" value="/u01/Oracle/Middleware"/>
<data-value name="USER_INSTALL_DIR" value="/u01/Oracle/Middleware/wlserver_10.3"/>
<data-value name="WLS_INSTALL_DIR" value="/u01/Oracle/Middleware/wlserver_10.3"/>
<data-value name="COMPONENT_PATHS" value="WebLogic Server|Oracle Coherence"/>
<data-value name="JAVA_HOME" value="/u01/Oracle/jdk1.6_45"/>
<data-value name="WLS_JAVA_HOME" value="/u01/Oracle/jdk1.6_45"/>
</input-fields>
</bea-installer>
-------------------------------SILENT.XML--------------------------------------------------------