What to do if the Washing Machine has a peculiar smell?

I cannot change the temperature setting for the "ECO 40-60" program. How to do it?

Water remains in the Washing Machine drum after the wash cycle is finished. Why?

Why are my clothes still wet after washing, even with the spin speed set to the highest level?

I saw that if I use the Super Quick washing program, the washing powder remains on my clothes after the end of washing. Why?

I have just installed my Washing Machine and found a small amount of water inside the drum. Does it mean this appliance was used?