On #1-- Does the emergency flasher work all lights correctly? I believe that the multifunction switch (turn signal lever) goes into the E - flasher, could be bad.
On #4, if it is a factory installed Uconnect system, look in the glovebox or center console (if equipped) for a red connecting plug like the one pictured. If so then it is for an iPod to plug into and the parts dept will have the short cord for iPod use. If you do replace the factory stereo, yes you will lose Uconnect. The other side of the coin is, depending on the radio you're looking at, a lot of them have bluetooth and aux inputs built in.
On #4, if it is a factory installed Uconnect system, look in the glovebox or center console (if equipped) for a red connecting plug like the one pictured. If so then it is for an iPod to plug into and the parts dept will have the short cord for iPod use. If you do replace the factory stereo, yes you will lose Uconnect. The other side of the coin is, depending on the radio you're looking at, a lot of them have bluetooth and aux inputs built in.