Toolbar at top possible?

Possible, yes. It’s just a matter of customizing the styling for it. It would probably be easiest for you to use the widget or shortcode version of the toolbar and create your own styles than to override the styles from the default toolbar, however.

There’s no simple *option* for changing the location of the toolbar, however.

Get yourself Custom CSS and add something like this

.a11y-toolbar{
position: fixed;
top: 0%;
left: 3.5%;
}
.a11y-toolbar ul li {
display: inline-flex;
}

@ gruby, many thanks, i whish solutions are always that simple!