Radio antannia is broke and needs replaced. How?

My radio antannia for my car is broke. and i need to know how to change my radio attania so i can replace it? My last one was electric. when i turned on the car the antania would automatically move up and when i shut off the car the antannia would fold down. can any one help and send me instructions on how to remove the broken one and put a new one in. and also would a universal one work? or does it have to be electric like the old one? and if a universal one would work can it be spliced onto the wires from the old one?

thank you for any help you can give me.

yes same car. for some reason the other day my question did not go through right away and then when i checked the next day both questions were there.