B767-300 FLT CREW MISCONFIGURED ACFT FOR PACKS OFF TKOF RESULTING IN VARIOUS UNWANTED ANOMALIES AFTER TKOF.

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WE PLANNED A HVY-WT DEP FROM BOGOTA ON A B767 ACFT. THE TKOF WT AND TEMP REQUIRED THAT WE PERFORM A PACKS-OFF TKOF FROM RWY 13L; AND WE DISCUSSED THIS PROC IN THE BLOCKS BEFORE TAXI OUT. WE ALSO LOADED THE ZIP1H SID INTO THE FMS IN RTE #1; AND THE ENG-OUT PROC FOR RWY 13L IN RTE #2. DURING TAXI OUT; THE FO INADVERTENTLY CONFIGURED THE BLEED AIR SYS FOR AN APU TO PACKS TKOF INSTEAD OF THE PROPER PACKS OFF TKOF. I WAS PAYING MORE ATTN TO TAXIING BECAUSE SOME OF THE TXWYS WERE CLOSED; AND FAILED TO CONFIRM THE PROPER CONFIGN. OUR TKOF WAS NORMAL UNTIL APPROX 500 FT AGL. I HAD ALREADY CALLED FOR GEAR RETRACTION; AND JUST CALLED FOR 'LNAV;' WHEN THE EICAS GAVE US A 'C HYD PRESSURE' WARNING; FOLLOWED SHORTLY BY A 'GEAR DISAGREEMENT' WARNING. THE FO ALSO OBSERVED THAT THE CTR HYD PRESSURE LIGHTS ON THE OVERHEAD PANEL WERE ILLUMINATED. HE THEN OPENED THE L BLEED AIR VALVE TO RE-ESTABLISH AIR CONDITIONING AND PRESSURIZATION. I ELECTED TO CONTINUE ON THE SID; AND DISCUSSED LEVELING OFF AT 12000 FT MSL; AND TURN BACK TOWARD THE BOG VOR TO WORK THE PROB. TO FURTHER ADD TO THE CONFUSION; THE CABIN ALT WARNING ACTIVATED. THE FO ESTABLISHED THE NORMAL BLEED AIR CONFIGN FOR FLT; AND ANNOUNCED THAT THE HYD WARNINGS HAD EXTINGUISHED AND THE GEAR HAD RETRACTED NORMALLY. THE CABIN ALT WARNING CEASED SHORTLY THEREAFTER. I ELECTED TO CONTINUE THE FLT TOWARDS DEST. DURING CRUISE; WHEN WE WERE DISCUSSING THE EARLIER PROB AND HOW TO WRITE IT UP IN THE LOGBOOK; WE REALIZED THAT THE IMPROPER BLEED AIR CONFIGN AT TKOF HAD REMOVED BLEED AIR FROM THE CTR DUCT; AND THE CTR ADP HAD NOT ACTIVATED TO AID GEAR RETRACTION AS IT IS SUPPOSED TO. THIS; IN TURN; HAD CAUSED THE CTR HYD WARNINGS. IN OTHER WORDS; OUR IMPROPER CONFIGN OF THE BLEED AIR SYS; HAD CAUSED THE PROB. THE VAST MAJORITY OF HIGH ALT DEPS THAT I HAVE PERFORMED HAVE BEEN IN THE B757; USING THE APU TO PACKS TKOF PROC. IN THE FUTURE; I NEED TO PAY GREATER ATTN TO THE TYPE ACFT; AND CORRECT PROC; BOTH IN BRIEFING AND IN PRACTICE. I HOPE THIS EPISODE WILL SERVE AS AN EXAMPLE AND REMINDER TO OTHER FLT CREWS OP IN A HIGH ALT ENVIRONMENT.