Car started to slow down and then the check engine light, battery, and engine oil light came on. What could cause this?

I was driving home from work started to go up a hill and started to slow down. Went to step on the gas and nothing was happening. Was able to pull over parked the car and saw the Check engine light came on. Turned the car off to check. checked the oil, tried to start the car and it wouldn't turn over. Then along with the check engine light the battery light and motor oil light came on as well. What could cause this?
My car's transmission is unknown to me.

– Car started to slow down and then the check engine light, battery, and engine oil light came on. What could cause this?

Reverse lights stopped working.

I replaced my engine battery in my hybrid car. There was an issue getting the battery out, as it appeared to be the original battery that came with the car in 2006. Shortly after the replacement, I noticed my reverse lights stopped working. I checked the bulbs, they were fine. Checked the fuses, they were fine. My friend thinks it might be the relay box. Which of course is a more expensive repair. My brake lights are fine, except one has gone out, but we believe it is the bulb.

I am wondering if anyone has ever heard of such a thing happening with the hybrids?
I do know certain types of rep

– Reverse lights stopped working.

2000 escalade will not lock with the key in the ignition, it only chimes and doesn’t engage lock.

Did not come with keyless remote. Doors will power lock and unlock with key out of ignition. When key is in the ignition, I can unlock, but can not LOCK. There is nothing engaging to try n lock. When I press the lock on power lock when key is in the ignition it doesn't lock and it chimes, ding ding ding, until I release the lock button.

I have purchased a new keyless remote, as well. I have followed the directions to program the remote with no luck as well.

Any help on these two issues will be much appreciated.
Thanks
Trying 2 do it myself

My car has 220000 miles.
My car has an au

– 2000 escalade will not lock with the key in the ignition, it only chimes and doesn’t engage lock.

A/C not blowing through dash vents

I had my battery changed about two weeks ago and ever since then the a/c won't blow from the dash vents. I've tried recalibration by disconnecting the battery and pulling the HVAC fuses, letting it sit then hooking everything back up. When I turned the car on it went trough it's cycle and for about 15 seconds the air came through the dash, but then it stopped. I was a little disappointed, I thought I was on to something. Could my issue be the actuator?

My car has 146000 miles.
My car has an automatic transmission.

– A/C not blowing through dash vents