Here is a basic arrangement of the typical Taoist altar of the Hsien-t’ien Tao and affiliated sects. It's from Eva Wong’s book on Taoism, right at the end: pages 235 -237. She's an internal alchemist from what I can remember.
At the centre of Taoist ceremony is the altar. The altar is an image of the Tao and the spiritual centre of a sacred space. Although the arrangement of the altar varies among Taoist sects, and different rituals call for special arrangements of ceremonial objects, the significance and symbolism of the objects on the altar are the same.
A sacred lamp: this is the light of wisdom. It is also the golden pill or elixir of immortality. The lamp is usually placed in the centre of the altar in front of the patron deity of the temple or the deity being honoured in the ceremony. The lamp symbolises the original spirit, which is the light of the Tao within. It is never extinguished.
Two candles: to the left and right of the sacred lamp are two tall candles. They represent the light of the sun and the moon in nature and the two eyes in the human body. The sun and moon are emanations of the light of the Tao, and the eyes are windows to the mind. If the mind is not tainted by dust, original nature will be bright; the light of the Tao will shine within, and the eyes will not be covered by the dust of the mundane world.
Tea, rice, and Water: directly in front of the sacred lamp are three cups. The cup in the centre holds grains of uncooked rice; the cup to the left contains water; the cup to the right contains tea. Tea symbolises yin, or female generative, energy; water symbolises Yang, or male generative, energy. Rice symbolises the union of these two energies, because it receives the Yang energy of the sun and absorbs the yin energy of earth.
Five plates of fruit: the five fruits represent the five elements: wood, fire, earth, metal, and water. Each element is associated with a colour. Wood is green, fire is red, earth is yellow, metal is white, and water is black.
An incense burner: the incense burner is typically placed in the centre of the altar in front of the five plates of fruit. This is the stove, or the lower tan-t’ien, where internal heat is generated to purify and refine the generative, vital, and spirit energy. The three energies are symbolised by three sticks of incense. The burning of the incense symbolises the refinement and purification of the internal energies. The rising smoke and falling ash also symbolises separation of pure energy from mundane energy.
On the altar, the sacred lamp, which is the symbol of original nature, is closest to the deity. Arranged progressively away from the deity are the two candles, the tea, rice, and water, the fruit, and finally the incense burner. This arrangement shows that the entrance to the Tao begins with purifying the three internal energies, reconnecting the body with sky and earth; when the energies are refined they are gathered in the five viscera to nourish the body, a process represented by the five plates of fruit; as spiritual development continues, the Yin and Yang energies copulate -- represented by the cups of tea, rice, and water; when the original spirit emerges, the Tao shines within and a golden light hovers around the eyes -- represented by the two candles. Finally, the original spirit, symbolised by the sacred lamp, is cultivated to return to the void and merge with the Tao -- the deity in the icon.