1996 Plymouth Breeze

I have a 96 Plymouth Breeze, 2.0 liter, 4 cyl, automatic trans. It has 135,000 miles on it. Is getting older so I have a few questions?
1. The left side blinker is flashing very fast and does not show in the rear of car that you are turning?
2. The heater/air conditioner only blows out the defrost?
3. The H/AC knob only blows air on high?
4. While idling at a light, the car just shuts off, it will usually start right back up?
5. Where the mileage shows, it now dings back and forth between saying door then mileage. Most of the time now it stays on door?

In the last year, I have had the cam sensor leak oil and it was changed. I have all the timing belts changed. It has had a tune up. The starter has been replaced. I bought the car new in 97 with 40 miles on it. Since then I have had to have the headgasket changed 3 times for leaking oil. Also have had the rear main seal changed once. I like my car, but is getting very expensive on keeping it going. Any help you can offer on my questions would be helpful, thank you.