Takes pictures without pressing, switches settings, playback view has

When I turn my camera on, it takes pictures rapidly without me pressing the button. When I try to view my pictures, there's a delay in response and when it shows up (the picture) there's a Specs window (date, shutter, ISO, speed, etc.) I'm not sure how to rid of it. It didn't have that before and I looked at the instructions manual. It takes a few seconds for it to disappear. The camera buttons in general take a bit to respond and goes back and forth. I took the battery out and lense off, cleaned/dry wiped. I'm not sure what's going on :( it's a used camera my boyfriend bought me. It worked great when I first opened it and used it.