ANS : You can opt for the option of getting your gum treatment done by a periodontist who will give you the line of treatment of slicing (cutting) the margins of your gums to give it a more pleasing look.
ANS : Fillings on the front teeth may be changing its colour due to your food colours and stains, permanent solution for this would be to go for the Capping or Veneer.
ANS : Yes, even if you are scared of dental treatment, now-a days you can have all your treatment done under conscious sedation (Sleeping Condition) routinely in the dental clinic, no need to get admitted in the hospital.
ANS : Yes, you can go for the Ceramic Fillings, Ceramic Veneers or Ceramic Caps which are the same matching shade of your teeth and makes you feel more beautiful, more confident, more smiling.
ANS : Select a tooth paste which contains proper level of calcium & fluoride content depending on your teeth & water content of fluoride in your city. If you are having teeth sensitive to hot & cold liquids use a tooth paste which contains potassium nitrate or sodium mono fluoro phosphate. Select a tooth brush which should be soft or medium ( not hard ). If possible get an angular & rubber coated headed brush. Select a mouth wash which contains chlorhexidine, triclosan,sodium fluoride combination. If you are having teeth sensitive to hot & cold liquids use a mouth wash which contains potassium nitrate or sodium mono fluoro phosphate.
ANS : Pain and sensation with cold water is caused when the outer layer of the tooth (enamel) is worn off due to faulty brushing habits or due to cavites or if your gums have receeded (gone down) due to age. You can have this problem treated by getting it filled by a material and learning the right technique of brushing your teeth, (so as to have a longer life of healthy teeth and avoiding the same problem on other teeth and by using de-sensitising tooth paste and mouth washes).