Question

1. Brush twice daily.
2.reduce amount of snacking.
3.floss regularly.
4. Visit your dentist once a year.

Tooth sensitivity is as a result of exposed dentinal tubules which can be caused by caries, improper brushing techniques or bad oral health. You will require a dentist to examine and ascertain cause of your sensitivity and manage appropriately

Plaques and calculus can make your teeth look dirty.
Scaling and polishing will restore your tooth natural color.
For whiter teeth you will need a tooth bleaching procedure done or dental veneers.

The cost of extraction varies according to the condition of the decayed tooth. You will need to be examined to evaluate cost for your extraction