loses the gauges on 1995 Oldsmobile Cutlass Supreme

the car starts and idles fine when put into gear it loses all gauges and check engine light comes on and runs rough

STOP.... yowch..this just happened to me and it means your alternator is going or already gone.... go to shop and get it checked... I got stuck on side of road after trying to put my window down and all instruments went out,, dont let this happen to you..alternator is about 200 dollars to have replace.. 115 if you do it yourself. good luck..