ATCT LCL CTLR AT SJC DID NOT ISSUE TIMELY TKOF INSTRUCTIONS TO AN ACR IN POS RESULTING IN A GAR BY A COMPANY ACR ON SHORT FINAL.

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Z TIME: XA35Z. FREQ/ALT: 124.0/ARPT ELEVATION. ATC FACILITY: SJC TWR. LOCATION: SJC. CLRED ONTO RWY 30L POS AND HOLD. OUR FLT GIVEN TO COMPANY ARR FLT AS TFC ON RWY. COMPANY FLT ASKED TWR IF WE WERE GOING TO INITIATE TKOF IN TIME FOR THEIR LNDG. TWR THEN ADVISED US; BEGIN TKOF ROLL WITHOUT DELAY; TFC SHORT FINAL. FO ACKNOWLEDGED. I WANTED TWR TO CLARIFY INSTRUCTIONS BUT COULD NOT GET TO MIKE BEFORE TWR ISSUED GAR TO LNDG COMPANY FLT. DECIDED TO CONTINUE TKOF IN INTEREST OF SAFETY. ISSUE: TWR CLRED US INTO POS BUT DID NOT ISSUE STANDARD TKOF CLRNC. ISSUE: TWR DID NOT REALIZE HE HAD FAILED TO ISSUE STANDARD TKOF CLRNC. ONLY RECOGNIZED CONFLICT WHEN RPTED BY ARRIVING COMPANY FLT. ISSUE: VISIBILITY WAS POOR AND WE COULD NOT SEE LNDG ACFT WHEN WE TOOK THE RWY. I WAS CONCERNED ABOUT ABORTING TKOF WITH LNDG ACFT CLOSE BEHIND. TWR DID NOT GIVE US INFO ON LNDG ACFT BUT DID ADVISE LNDG ACFT OF OUR POS ON RWY. CTLR PUT US IN A VERY BAD POS BY CLRING US INTO POS ON RWY; WITH TFC ON RWY; WITHOUT ADVISING US OF TFC LNDG BEHIND US OR TELLING US TO PREPARE FOR IMMEDIATE TKOF. HE ALSO FURTHER NEGLECTED TO ISSUE STANDARD TKOF CLRNC. IN THE FUTURE I WOULD ATTEMPT TO OVERRIDE FO AND ASK FOR TKOF CLRNC TO BE REPEATED. CONTRIBUTING: HAZE AND EARLY MORNING SUN PREVENTED US FROM SEEING LNDG TFC.