If your oil level is where it should be and If it just for a short time yes, because the oil has not reached the top of the engine from the sump thus causing the noise due to lack of lubrication... It should go away in a matter of a few seconds as soon as there is oil flowing over the valve train and chains. If it is lasting more like a minute i would get concerned something is blocking the oil pick up tube or the oil pump is faulty and oil is not getting up as fast as it should. Just about all cars make a short ticking noise in the begginig especially if they are high on miles... The joy of hydraulic lifters! As it's a 2002 model it has probably been serviced using synthetic oils. If it's done over 60K miles it's probably worth getting an engine flush at the next service. Over time the lifters get 'sticky'. It is good for freeing the sediments from the oil galleries and bearing surfaces too.
That slight ticking sound is probably the injectors firing which is normal.
If the ticking sounds like a "normal" ticking, it is probably the fuel injectors.
The tinking sound if it is a light sound is probably the fuel injectors working which is normal but I would check the oil level and make sure it is full first it could be lifters ticking or clattering.
A normal ticking is the fuel injectors opening and closing, a very loud ticking with bad mileage and poor performance may be a sticky lifter, aka hydraulic valve lash adjuster. If the latter try something like Marvel's Mystery Oil or another sticky lifter nostrum before launching into a difficuly and expensive replacement.
It is normal in cold weather, it's just the knock sensors. If however, it still ticks after engine is warmed up, e.g after driving for 20-25 minutes, get someone to look at it.
The check engine light is not related to the oil or the transmission fluid systems. It is related to fuel control, computer, emmissions control systems. The faint ticking you hear may just be the normal noise coming from the fuel injectors. All fuel injectors make some kind of ticking noise while they operate. I would say, if the check engine light has anything to do with the services performed, it would almost have to be a simple connector that may have been unplugged to move a wire out of the way, and then forgotten. Otherwise, I believe it would have to be a coincidence. Even if the ticking noise is a lifter in te engine, that still would not cause a check engine, and would not be the fault of someone changing the oil, as long as the oil is full.
Jaguars can have 1 but the normal is 4.
Normal not synthetic.
It could be a sticking valve lifter. If you didn't hear it before, it should be investigated. Ticking is not normal.
It is normal for a carburetor to "suck air" when you are starting the engine or while the engine is running. You should stop the engine before repairing the carburetor for safety reasons.
Yes. That's part of the ECU self-test.
"comfort" = 28psi "normal" = 32psi