Set Static Route with an Outgoing Interface

Hello,

I have just purchased an SRX220 to replace my home router. 

I am trying to setup a static route but Virgin Media who are my ISP won't give me the Gateway IP address. On a Cisco device I know that you can set a static route with an outgoing interface but can't find out anything on the web regarding this with Juniper.

I believe I have set the interface correctly as unsure of the IP address as they won't give me the details. Can someone confirm that this interface is set correclty to receive an IP address via DHCP....

ge-0/0/0 {
         unit 0 {
                 family inet {
                        dhcp;
                 }
         }
}

Is it possible to configure a static route with an outgoing interface? If not I think I may of just spent £300 for nothing.

Many Thanks

Peter