cosmoservice Try add this to custom.css file :
#bannerwrap .slideshowbackstretch .zentools .slidecount, #bannerwrap #banner .allitems{display:none !important;}
Kindly ensure to clear your browser cache if changes dont reflect.
Change the photos, in which folder should I upload my images?
You may kindly follow the steps outlined thereafter :
1) Go to specific module >Image Source Settings > Image Directory in which relative path for image directory can be changed accordingly
2) Thereon, You may add/edit images in specific folder selected