Depending on your age and what your skin actually needs, you should need this basic 4 items which are cleanser, toner, moisturizer and sunscreen.
Also, you should try to cleanse your face daily and use toner and moisturizer right after you cleanse. Toner can be use without cleansing your face but you gotta research on the product itself. Sunscreen is a definitely must have no matter how many step you have and ofc use it during the day and not night time