No power to car at all

2006 Chevy Impala ltz 3.9 l pulled it into my shop
to do maintenance and repairs car sat for 4
months while doing these repairs. Replace a
broken swaybar and both power steering lines
cause of leaks had to disconnect motor mounts
and roll motor forward to get enough room to put
in powers steering lines and swaybar. Put
everything back together and trickle charger the
battery. Went to start everything came on but
would not crank over went to turn key off and it
was locked and would not come out had to pull
covers of colum and press the release button.
Tryed it again after replacing battery terminals and
cleaning up all ground connections and positive
connections. Same issue no crank. Dash lights that
are on are seatbelt abs and car with lock. Also
shift indicator didn't have box around the park
letter. Can't unlock the doors with fob or switch
and the windows won't go up and down everything
else seems to work. Now recently no power
besides seats and mirrors.