no you do not have to change the timing chain when changing the water pump.
I need diagram on changing the timing chain
Changing a timing belt is very complex with hundreds of details. Directions for changing the timing belt can be obtained when you purchase the timing belt.
yesyes
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Your timing chain may be worn to the point it is jumping a tooth and thus changing the timing. If you can hear the chain that is a good sign it is worn. I would inspect the timing chain.
103,000, and I was advised not to drive over that until the timing belt was replaced
No, timing chain doesn't need replacing.
It does not have a timing belt it has a chain
No. Ignition timing is totally controlled electronically, and changing plugs will not have a direct effect. You can always check it with a timing light if you want, but there's nothing to adjust.
Not usually
NO.