Why won't my car idle

Cars are design to run at a higher idle at start up to warm them up quick. There is a sensor that reads water temperature and tells your car's computer how fast to idle. Your RPMs seem slightly high but not out of the norm. Does idle ever drop to around 600/800 after about a minute? If not, your engine temperature sensor maybe defective.

bad idle, and surges.
gets better, does that mean it idles at the correct regulated RPM
HOT? 800.?
and does the engine coolant hit 180 to 200 F and hold there.?
Sounds like the ISC valve is stuck open, clean it.
ISC means, idle speed controls.
also air leaks, vacuum leaks can do this on speed density, EFI.
Im not sure which EFI you have, too lazy to look that up.

which engine do you have, and what country, ?
as a mech, i open hood and look, on the net , i cant do that.
so.... no real help

run the fault codes
check for vacuum leaks on all vacuum hoses
check fuel pressure
use quality injector cleaner

When was the last time a full tune up have been done? A bad intake gasket would do that.

Run a fault code test as a starting point for diagnosis of this problem, learn how to do that here

mcdevito75 here, Sounds like the idle speed motor or the idle speed sensor is no good. Your local shop can check this out for you.

intake gasket!!!!!!!

What type of car???? could be something in the computer/engine control system. if its a late model have it checked out could get worse

you have a rod knocking this is a serious problem the more you drive it the worse it will get
it could also be a warped push rod but thats a slim chance

try replacing your EGR Valve, or your Oxygen Sensor