2010 LT Electrical Issues

I have a 2010 chevy Aveo LT Auto.

1. When i shut off car my clock turns back to 1:00,
2. before radio stopped working the speakers would make weird bad noises
3. now my break lights are on all the time and don't shut off.
4. radiator fan seems not to work.
5. car hesitates when driving normal but when you hit the gas it does not. (i did replace spark plugs it seemed to work better for a bit but now doing it again)

I took it to my dealer but they said the 95.00 thermostat code came up that it needed replaced so i did and replaced radiator as it had a hole in it.

Any ideas would be greatly helpful
-Tad