It looks like you’ve bought this code from somebody and you’re trying to do a re-skin, right?
The problem is that the code is old and the plugins used are either not available anymore or have changed in a substantial way which will require you to modify the code.
My advice is that you take the time to learn how Corona works so that you can make these modifications yourself.
There are many resources available here:
Yes right i bought it from codecanyon i don’t have many time to learn how corona works can someone do this for me for a small price?
I believe this is the template. It was published in 2015. https://codecanyon.net/item/jetpack-game-admob-iap-leaderboard-achievement/13495824?s_rank=21
Our plugin system has changed significantly since then and will need updated to the new plugin system. Hiring someone to do this is something that would work. However…
If you want to use AdMob, you will have to purchase the AdMob plugin: https://marketplace.coronalabs.com/plugin/admob
You really cannot proceed until you do this. AdMob used to be a free plugin, but it no longer is. If you want AdMob and not purchase the AdMob plugin, you can adapt Appodeal which includes AdMob ads.
Once you make that decision, then you could hire someone to adjust the code for you. If you want to hire someone, I would recommend that you change the forum post title to reflect you want to hire someone to implement ad code. If you do, I can then move this to the Jobs forum where it will be best.
Rob