Combobox/Textbox - I want to be able to chose an option from CB and display it in the textbox

I am writing a windows form application and I have a combo box, which shows pictures in a picture box when the item is selected from the combo box, but I want to be able to: when chosing the option from the combo box, to be able to see the picture and information about the item in a text box, while being able to add and remove items from the combo box (which I have no idea how to do, I can only add and remove from the text box) and also have a working previous and next button.

Any help at all would be greateful.