The direct answer to your question would be 25/30k. This is the cost of the most traditional metal braces.
There are different types of braces available in the market. The best being Invisalign. Looking at your teeth, It will cost you somewhere around 2.5-4lakh.
The most important factor to be understood here is that for orthodontic treatment , the treatment time depends upon which kind of braces you choose.
If you just want to look at the cost factor.. It can be easily done in 25-30k. But the time taken for the treatment would be more compared to the advanced options available.
Next Steps
If you want to understand your options better you can either visit a dentist or consult me for the same.