Your brass figure is called a "Shiva Nataraja" that depicts the god Shiva dancing in a ring of fire, standing victoriously upon the "dwarf of ignorance" and on a stylized lotus blossom, symbol of spiritual purity.
Shiva is one of the three principal Hindu gods and the nataraja is this depiction as "Lord of the Dance" -the cosmic, ecstatic dancer.
Yours is an adaptation of a bronze from the Chola dynasty and typical of those made in Tamil Nadu (a southern state in India) in the 10th century.
They were traditionally old temple devotional objects. The originals were decked with colored fabric and paraded through the streets during processionals so that devotees could see them.
Yours almost certainly originated in Swamimalai, near Kumbakonam, a major center for bronze casting in Tamil Nadu where every conceivable ornamental brass or bronze idol is made. Hard to be exact about the date, but most likely 1950s - 1970s in date.
These are still produced in great quantities so prices for them are modest, even these vintage ones. However, yours is definitely a cut above the ordinary, because it is selectively highlighted in two-tone brass. Also, the hands and feet are well defined, another feature of quality.
This example, for instance, very similar to yours, sold on line (eBay) for $45, which is about right. I would give yours an auction or on-line value in the range of $40 - $75.
If you were to see if for sale in a retail setting, in an antique store, say, it would have a price tag of $150. This is also the replacement value for insurance purposes.
I do hope this helps!
Please let me know if you'd like me to explain or expand on any of the above, I would be glad to.