If they look like this photo, they are lead.

Doesn't mean there is a problem, but will be somewhere down the road. The older the lead gets, the worse it gets, and standing water collects more toxins, so one thing to do is run the water for a few minutes before using to flush out what has been sitting in the lines.
How big a job depends on how much of the pipe is accessible and how much of it to replace. No lead pipe is best, but the less, the better. I've done a few jobs replacing what was accessible and leaving the rest.
For now, wait for the test and see how it goes.

Doesn't mean there is a problem, but will be somewhere down the road. The older the lead gets, the worse it gets, and standing water collects more toxins, so one thing to do is run the water for a few minutes before using to flush out what has been sitting in the lines.
How big a job depends on how much of the pipe is accessible and how much of it to replace. No lead pipe is best, but the less, the better. I've done a few jobs replacing what was accessible and leaving the rest.
For now, wait for the test and see how it goes.
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