Coolant leak- may mean air is getting into the system, hens gurgling noise. When/if leak is fixed, fill cooling system with heat ON to minimize noises, but yes mine makes a slight noise when the heat first comes on. Not a constant noise though. Water pump or it’s gasket may be bad as has been said.

Trans shifting flare- has the trans fluid and filter been changed lately? Every 30K miles? Did they drain the fluid out of the torque converter? If not, do it again first before deciding to bail on the car. Use quality synthetic fluid.

Power steering- not just change the fluid, but flush it out well, and get a new filter. Has it been changed every 30K miles? Use quality synthetic fluid.

My 300TE always stalls on the first attempt to start it cold. Don’t know why. I wait 3 seconds, start again, and it fires up. I just think of it as an old car quirk, but I only have one, and you have a bunch. I can see how that gets old. Good luck, Dave