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How can I check your website? I was going to help you create a example page in your website.
Followings are your issues. right?
2) I have made an all tours page, but for some reason, only 5 of the tours are showing up. Also, is there a way to make a page that lists only certain tours, as we want to have lots of adventure tours, but we would like customers to be able to click for bachelor parties and that page only shows tours relevant to that, also have them listed on the front page on a separate grid.
You can create a page and show special tours using WPBakery element.
You can show tours in special tour type, etc. http://prntscr.com/owtkrq
3) On the page listing all tours, I can't make it look like your sample page with the filter elements on the sidebar
Please visit https://epicdaysbali.com/tour
It is not special page. It is search page. You can config this page in theme options panel.