ACR ON APCH HAS TCASII INSTRUCTIONS TO DSND; THEN TO CLB.

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FLT WAS FROM EWR TO MHT. APCH CTL DSNDED US TO 3000 FT AND TURNED US DOWNWIND FOR SPACING. WE WERE TURNED BASE; HDG 090 DEGS AT APPROX 10 NM FROM THE ARPT AND APCH ADVISED US OF TFC CLBING THROUGH 2500 FT WBOUND ABOUT 8 NM AT 11 O'CLOCK. WE COULD NOT SEE THE TFC AT 4 NM CLBING THROUGH 2800 FT. ABOUT THIS TIME WE GOT A TCASII RA TO 'DSND' SO I DISCONNECTED THE AUTOPLT AND AUTOTHROTTLES AND INITIATED A DSCNT. AT APPROX 2800 FT THE TCASII REVERSED AND GAVE A LOUD 'CLB NOW; CLB NOW' SO I PULLED THE NOSE UP AND ADDED PWR. WE WERE ABOUT 3700 FT WHEN WE GOT A 'CLR OF CONFLICT' AND ABOUT THIS TIME WE SAW THE TFC PASSING 11 O'CLOCK AT ABOUT 2 NM. WE WERE THEN CLRED FOR A VISUAL APCH AND LANDED ON RWY 35. THE TARGET ACFT NEVER GOT CLOSER THAN 2 NM AND HAD WE SEEN IT; IT WOULD HAVE BEEN OBVIOUS THAT LITTLE; IF ANY; MANEUVERING WOULD HAVE BEEN REQUIRED. HAD THE TFC BEEN DIRECTLY AT 12 O'CLOCK; HEAD ON; THE MANEUVER MAY HAVE BEEN APPROPRIATE. ALSO; WHEN THE NOSE CAME UP; SOME EQUIP IN THE AFT GALLEY STARTED SLIDING AND HAD TO BE RESTRAINED BY A FLT ATTENDANT WHO MAY HAVE INJURED HER BACK. I CALLED THE ATC SUPVR FROM OUR OPS OFFICE IN MHT AND RPTED OUR ALT DEV. I ALSO ASKED HIM TO REVIEW THE CTLR'S INSTRUCTIONS TO TURN US BASE WHEN IT PUT US ON A CLOSING COURSE WITH VFR TFC CLBING THROUGH OUR ALT. THE TCASII IS NICE BUT THIS SITUATION WAS NOT NECESSARY.