Durga, in Sanskrit means "She who is incomprehensible or difficult to reach." Goddess Durga is a form of Shakti worshiped for her gracious as well as terrifying aspect. Mother of the Universe, she represents the infinite power of the universe and is a symbol of a female dynamism.
Goddess Saraswati (Sarasvati) is the wife (consort) of Lord Brahma. Out of all the God and Goddess she is the one who possesses the powers of speech, wisdom and learning. Maa Saraswati has four hands representing four aspects of human personality in learning; mind, intellect, alertness and ego.
Lord Nandi puja is done for gains in career and profession, good health, increased longevity, win over enemies and win in court case (litigation) too. We arrange Puja or Homam by learned Purohit, along with reciting the Vedic mantra of the particular Devi or Deva along with the Homam done.
Lord Vishnu is one of the lord of the Hindu Trinity apart from Lord Brahma and Lord Shiva.
Sri Krishna is the incarnation of Lord Vishnu. Sri Krishna was born in Dvapara age. Lord Krishna was born in prison Maa Devaki and Vasudeva. He was raised by his foster parents Nanda and Yasoda in Gokul.
In Hindu religion Goddess Maa Lakshmi is the Goddess of Wealth and riches whereas Lord Kuber is the keeper of the wealth for Gods. Worshipping Kuber and Lakshmi together brings prosperity, fame, wealth, divine happiness, mental spiritual satisfaction and materialistic comforts.