The problem you are facing is a very common issue faced by majority, so no need to panic or be afraid. A simple surgical extraction procedure will be done to remove the wisdom tooth, which obviously would be painless, but would take a little time.
As for the adjoining tooth, a simple composite filling might be sufficient , although a clinical examination would be better for definitive treatment.
As for the cost, it will heavily depend on the dental surgeon (from 1500-3000)
Next Steps
Visit a nearby dentist ( who is experienced in wisdom teeth extraction) or a maxillo-facial surgeon (which will be costlier)
Health Tips
Wisdom tooth of upper arch, (immediately above the one that's causing you pain) will "supra-erupt" in a few years causing various issues. So that needs to be removed too