How can I remove the list dropdown box on top of my list? I don't want users to be able to switch list id. Even if I have just one list the selectbox is still shown.
Edit your userlists and within Parameters > Display set "Show List Selector" to "No".
Can I remove the "... has ... registed users" message on top of my list? Beside pagination I don't want anything else in the top of the bottom of my lists.
There's no parameter for that, but you can hide it with the below CSS.
Code:
.cbUserListResultCount {
display: none !important;
}
Can I have a second pagination bar on the top of my list? So users don't have to scroll down to the end of the page.
Nope, there's no feature for that; it only renders 1 pagination bar and that's at the bottom. You'd have to modify the core files for it to render the pagination twice.