Buddhists don't consider Buddha to be a god. Buddhists consider Buddha as a being beyond any god. That's why he is called "Satta Deva Manussanam" - the teacher to gods and humans. 

The things you mentioned are forms of paying respect to the Buddha. If you learn the meanings of the stanzas Buddhists chant while worshipping, you will understand the purpose better.

The statues are used just as a representation of the Buddha. They know that those are not the real Buddha and that they are made of stone or wood. The concept is similar to people using framed pictures of their dead parents and light candles etc. as a form of respect and appreciation.