A TBM7 PLT; TAXIING FOR TKOF AT TPA; LINED UP WITH AND STARTED TKOF ROLL ON THE PARALLEL TXWY.

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I WAS PREPARING TO DEPART TAMPA INTL ARPT; VFR; TO STUART; FL (SUA). I RECEIVED A CLRNC FOR THE FLT FROM CLRNC DELIVERY; THEN ASKED GND CTL FOR PROGRESSIVE TAXI INSTRUCTIONS AS I WAS UNFAMILIAR WITH THE ARPT. I WAS LOCATED AT THE SE CORNER OF THE ARPT; VERY NEAR THE ACTIVE RWY (36R) AND GND CTL TOLD ME TO PROCEED S TO THE END OF THE RAMP AND USE TXWY P TO RWY 36R. AT TXWY P; I HELD SHORT; DID MY PREFLT AND CONTACTED THE TWR AS READY AT RWY 36R. THE TWR CLRED ME FOR AN IMMEDIATE TKOF AND I PROCEEDED W ON TXWY P TO WHAT I THOUGHT WAS RWY 36R; BUT IN REALITY IT WAS A VERY WIDE TXWY D. I COMMENCED A TKOF ROLL AND AT THE SAME TIME I REALIZED SOMETHING WAS NOT RIGHT; THE TWR CALLED ME AND TOLD ME TO STOP IMMEDIATELY; WHICH I DID. THE TWR INFORMED ME THAT I WAS ON A TXWY; NOT THE RWY. I ASKED FOR AND RECEIVED PERMISSION TO DO A 180 DEGS ON THE TXWY. THE TWR TOLD ME TO TAXI TO RWY 36R AND HOLD IN PLACE; WHICH I DID. THE TWR THEN CLRED ME FOR TKOF AND I ENJOYED AN UNEVENTFUL TRIP HOME. DARKNESS; UNFAMILIARITY WITH THE ARPT AND HASTE TO DEPART WERE ALL CONTRIBUTING FACTORS IN THIS MISTAKE. BLUE TXWY LIGHTS SHOULD HAVE CERTAINLY REGISTERED IN MY BRAIN IMMEDIATELY; BUT THEY DID NOT IN TIME TO PREVENT MY STARTING A TKOF ROLL. THE SHEAR SIZE OF THE ARPT; TXWYS AND RWYS IS CERTAINLY NOT SOMETHING I AM USED TO. EVERYTHING THERE IS CLRLY MARKED; BUT AT NIGHT FINDING YOUR WAY AROUND A STRANGE ARPT IS EVEN MORE DIFFICULT THAN DURING THE DAY.