IDIOT LIGHTS AND SLIPPING GEARS

1994 OLDS CUTLASS CIERA. LIKE THE PREVIOUS POST, I TOO HAVE A RECURRING PROBLEM WITH THE IDIOT LIGHT CLUSTER FLASHING ON AND OFF SPORATICALLY; THE ABS LITE, THE AIR BAG LITE, SERVICE ENGINE LIGHT, ETC AT TOP RIGHT OF DASH. NOW THE FIRST / MAYBE SECOND GEARS SEEM TO SLIP IN AND OUT. ALL THIS OCCURS SPORADICALLY.
THE BATTERY WILL NOT HOLD A CHARGE OVERNIGHT. THE DASH LIGHTS HAVE BEEN FLASHING FOR ABOUT SIX MONTHS. ANY IDEAS?