From David Doyle’s Standard Catalog of Lionel Trains, 1945-1969:
375 TURNTABLE: This rather odd battery-powered accessory was offered in 1962-64. The two D-cell batteries supplied the power to drive the turntable in one direction; it had no reverse. Numerous small parts came with this, making it difficult to find today in “Excellent: or “Like New” condition.”
VG, 125; Ex, 175; LN, 225; Rarity 5
Even though I’m a Lionel guy, I would suggest you look at other turntables, such as those made by Atlas. A complete Lionel turntable is a collector’s item, but not sturdy or versatile enough to use for day-to-day layout operations.