My Hyundai Accent ticks very loud in the engine, is there any idea why?

What is your question?

I took my 2012 Hyundai Accent to numerous places and had it tested. It showed with a code of a possible Camshaft timing. What does that actually mean? And what does that have to do with the engine if so? And how can I find out exactly what is the problem with the engine? How much will that cost? Or would it cheaper to get a rebuilt engine? How much for that if necessary?

What makes this problem better or worse?

Starting it up makes ticks real loud.

How long has your 2012 Hyundai Accent had this problem?

A month ago it started stopping on me and ticking I stopped driving it.