Caching plugins completely killed jquery

I wanted to make my website faster so I installed w3 total cache. I didn’t like it so I uninstalled it and installed w3 super cache. Then I uninstalled it too, then I realized that:

-WP-Cycle slider plugin stopped working
-Contact form 7 was behaving weird (appending something like #wpcf7-f1-p123-o2 to the URL when submitting the form)
– The top admin toolbar does not show up when browsing the website (I only see it when im on /wp-admin/

Seems like these plugins have modified some files and didnt clean up when uninstalling them unfortunately.

Here is my website: https://goo.gl/XD9kEa
The picture in the front is supposed to slide.

What to do?

Thank you.