In the red marked area you see that both of these tuner monsters are normal summoned. As per indicated by this players turn.
Set monster cards are useful if you want to place a flip monster card to bait an opponent out.
If your Attack is greater than your opponent's card then you destroy your opponent's card
If your Attack is lower than your opponent's card then you take self inflicted damage
If your Attack is equal to your opponent's card then no one takes damage and both cards are destroyed.
(Note that some Spell cards can remain on the field after you use them).
(To set spell cards you simply need to place the card face down as seen below for playing a trap card.)
(Note that some Trap cards can remain on the field after you use them).