My website elitetruckparts.com I’m trying to create a search bar that can search item or products from my entire website. Can any one help with code or ideas in how to do it. Never used Wix code before 
The article How to Use Code to Let Your Users Search a Collection will get you going in the right direction. You can start with the code as presented in the article and then build on it to meet your requirements.
Have fun,
Yisrael