helloo...read thru ur query...and accordingly i must say that best treatment esthetically is removal of that supernumerary tooth(mesiodens)..and closure of space will occur either automatically or you can go for orthodontic treatment...estimated costs depends on the place and local rate of extraction cost and orthodontic correction rate(if at all required).extraction is better because it cant be crowned or bridged because it will make an awkward smile...thats my opinion..ui suggest you to go to a dentist and get it treated based on clinical presentation and xrays...be cool its just a usual procedure(wont cost much).hope ur benefitted something from this reply..have a healthy day!!!

Thanks for your query, I have gone through your query.
The cone shaped supernumerary tooth is extra non functional tooth. If it is esthetically bothering you, then it can be extracted and the space created by the supernumerary tooth can be corrected by braces. The cost of extraction will be around 500rs and the cost of the orthodontic treatment varies from 25k to 30k, the duration will be around 1 year.
I hope my answer will help you, take care.