AT FL330 CLBING A B737-300'S TCAS FAILED; AUTOTHROTTLES DISCONNECTED; GPWS FAILED AND CABIN PRESSURE EXCEEDED 10000 FT. THE GND/AIR SENSE SWITCH FAILED. AN EMER WAS DECLARED WITH A RETURN TO LAND. THIS IS A REPEAT ANOMALY.

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TKOF AND CLB OUT OF ZZZ INITIALLY WENT FINE. BTWN 25000-30000 FT WE GOT A TCAS FAIL. SHORTLY AFTER THAT WE NOTICED THAT WE HAD AN AUTOTHROTTLE DISCONNECT. WE DID NOT GET AN AUTOTHROTTLE DISCONNECT LIGHT ASSOCIATED WITH THE DISCONNECT. THE NEXT THING THAT WE NOTICED WAS A GPWS LIGHT. WE HAD READ IN THE HISTORY OF THE PLANE THAT THERE HAD BEEN AN AIR/GND SENSOR PROB THE DAY PRIOR; SO WE THOUGHT THAT THIS MAY BE THE PROB WE ARE HAVING. LOOKED AT THE ACARS AND NOTICED THAT WE HAD A LAND TIME SHOWING; WHICH CONFIRMED TO US THAT THE PLANE THOUGHT IT WAS ON THE GND. AROUND 33000-34000 FT WE STARTED TO GET THE TKOF WARNING HORN. I LOOKED UP AT THE PRESSURIZATION PANEL AND ALL SWITCHES WERE CORRECT AND NOTICED THE CABIN ALT WAS AT 10000 FT. WE PUT ON OUR OXYGEN MASKS AND ESTABLISHED COM. I REQUESTED LOWER ALT AND WAS INITIALLY DENIED. I DECLARED AN EMER AND WE STARTED DOWN. WHILE DOING THIS I PULLED THE QRC OUT AND RAN THE CHKLIST FOR INTERMITTENT TKOF WARNING HORN/DEPRESSURIZATION. I WENT TO MANUAL ON THE PRESSURIZATION PANEL AND CLOSED THE OUTFLOW VALVE. WHEN I LOOKED AT THE VALVE POS IT LOOKED TO BE MOSTLY CLOSED. I WOULD ESTIMATE THAT IT WAS ABOUT 15% OPEN BEFORE I CLOSED IT. THE PRESSURIZATION DID NOT AUTOMATICALLY GO TO STANDBY WHEN IT HAD FAILED. THE HIGHEST THE CABIN ALT REACHED WAS ABOUT 11000 FT. DURING THE DSCNT WE GOT LOW IDLE LIGHT WITH THROTTLES AT IDLE. I TOLD THE A FLT ATTENDANT THAT WE WERE RETURNING TO ZZZ AND TO DO A CABIN ADVISORY AND THAT WE WOULD BE ON THE GND SOON. I ALSO TOLD HER THAT WE SHOULD HAVE A NORMAL LNDG AND TAXI BACK TO THE GATE. I CONTACTED DISPATCH AND ASKED FOR MAINT CTL TO JOIN IN. WE DIDN'T GET TO SAY MUCH TO DISPATCH DUE TO TIME CONSTRAINTS. INITIALLY; WE WERE GOING TO HOLD TO SORT THINGS OUT AND THEN GOT AN AFT CARGO LIGHT. WE NOTICED THAT WE WERE DOWN TO 114000 FT AND DECIDED THAT WE HAD OUR DUCKS IN A ROW AND DECIDED TO GO AHEAD AND JUST CONTINUE TO LAND. WE RAN APPROPRIATE CHKLISTS AND PROCEEDED TO LAND NORMALLY AND TAXI BACK TO GATE.