Novak Conversions Jeep Wrangler JK shifters

What is this ticking noise and how much will it cost to fix?

Well, we can't tell you anything unless you tell us where the ticking noise is coming from (preferably upload a video of the noise), when it happens, if it's constant or only on start-up, how long it's been going on for, etc.

In other words, you need to give us way more information than you have (which is pretty much nothing).
 
If it is ticking from the valve train / cylinder heads, unless you're a very good DIY mechanic, you'll want to take it to the dealer or a good mechanic that specializes in Jeeps.

Can't even begin to give you a cost, though I can all but guarantee it would be over $1000 if it is valve train related.
 
Novak Conversions Jeep Wrangler JK shifters