The first issue is that either you activated the TalkBack feature under Accessibility Options or you installed an app like NoLED or the AnyApp extension for Dashclock. An issue with TouchWiz causes the TalkBack feature to be active (even though the setting is off) if you run an app with Accessibility features. If you're running a different launcher, then that doesn't happen.
For the second issue you should have a toggle for that feature on the notification bar. Long-press that to get more options as to what you want to turn on and off.