A CL-601 CAPT RPTED THAT HE TOOK HIS FO'S WORD THAT THEY WERE CLRED FOR TKOF AT LGB. BUT HE LATER SEEMED TO ADMIT TO MAKING A MISTAKE. IT IS UNCLR IF THEY WERE NOT CLRED ONTO THE RWY AND OR NOT CLRED FOR TKOF.

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WE TAXIED FROM OUR HANGAR AT KLGB 1 HOUR BEFORE DEP FROM KSNA (REPOSITION). JUST PRIOR TO TAXI FROM KLGB; WE DISCOVERED THAT WE WERE MISSING SOME RADIO FREQ CHARTS. WE WERE 20 MINS LATE IN DEPARTING. WE WERE CLRED TO RWY 12 WHICH WAS UNUSUAL FOR US (NORMAL DEP ON RWY 30). THE TAXI TIME WAS SIGNIFICANTLY SHORTER AND WE WERE RUSHED TO COMPLETE ALL THE CHKLISTS BY THE TIME WE REACHED THE APCH END OF RWY 12. JUST PRIOR TO THE APCH END OF RWY 12; WE CROSSED RWY 7. I WAS CONCERNED THAT EVEN THOUGH WE WERE CLRED TO RWY 12; THAT I MIGHT BE XING AN ACTIVE RWY. I FELT THAT SINCE RWY 12 WAS ACTIVE THAT RWY 7 MIGHT BE ACTIVE AS WELL. THIS FACT; AND A LNDG B767 ON RWY 12 CLOSE TO ME; HAD MY FULL ATTN AND I DID NOT HEAR THE CONVERSATION BTWN MY COPLT AND THE TWR. I ASKED MY COPLT IF WE WERE CLRED TO GO AND HE SAID; 'WE ARE CLRED FOR TKOF'. I TAXIED ONTO RWY 12 AND ASKED MY COPLT AGAIN IF WE WERE CLRED FOR TKOF AND HE SAID CLRED FOR TKOF. WE WERE RUSHED (LATE) FOR DEP AND A BIT CONFUSED BY THE RWY AND TXWY LAYOUT AT THE APCH END OF RWY 12. MY COPLT MISUNDERSTOOD THE CLRNC AND I SHOULD HAVE BEEN PAYING ATTN TO HIS CONVERSATION WITH THE TWR.