you did not mention the kind of car. Most generally the chain should not have to be changed until it is noisy or giving a problem.
Hard to learn,noisy,lost of focus etc
No
To fix a noisy drive axle on a Chrysler 300M, the U-joint bolts should be checked to see that they are tight. If the U-joint was recently replaced, the noise could be coming from the U-joint itself. It should be aligned with the transmission exactly as it was before replacement.
Yes, you can get a ticket for excessive noise.
When they get noisy.
Absolutely.
Put new links in.
That would be never. All s-series have timing chains. (chain will stretch and get noisy if car oil not checked and changed on regular basis)
Yes, you can still drive a 2002 Isuzu Rodeo with noisy lifters, but it's not advisable to do so for an extended period. Noisy lifters often indicate a problem with oil flow, which can lead to increased engine wear or damage if not addressed. It's best to have the issue checked by a mechanic to prevent potential long-term damage to the engine.
my dad whom works on cars said "not for long"
If they are only noisy and are causing ABS problems you can probably drive on them for a bit. Check them often for looseness though as that becomes a safety issue.