How do you add transmission fluid to 1995 Monte Carlo?
pull the tranny dipstick out and add the fluid through the dipstick tube.
Key is designed to not come out unless the transmission is in the park position. If the shifter is in park but the transmission is not, then the linkage (which hooks the shifter to the transmission) has somehow come out of adjusment. It will need to be adjusted - I would suggest having this done by a professional.