Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concerns..
As per your query in case if you have bad/ decayed teeth then treatment is decided depending upon the severity of decays as well as whether there is need to extract the teeth to place the implants or the teeth can be conserved with treatment..
As far as implants are concerned, yes they are among the best treatments in case if you loose your teeth and looks more natural as compared to other fixed treatments like bridges and crowns..
The charges depends upon the type of implants as well as the region where you are put up..It is however in a range between about 10,000 to about 15,000..
In case if you do not have any medical conditions or bone elated problems, implants tend to last for long durations of about fifteen to twenty years..
My suggest for you would be to consult a dentist
and get evaluated and if you have multiple decayed teeth get a full mouth x ray
Once the x ray is done you will be advised appropriate treatments and it will be better to get your natural teeth conserved with treatments like root canal treatment
In case if any of the tooth needs extraction, then considering your age it will be best to go for implant placement..
Hope this information helps..
Thanks and regards..
Dr.Honey Nandwani Arora.