How I can live longer as well as peaceful by doing practices taught by Buddhism? How I can live longer and healthier as well as peaceful by following practices taught by Buddha, Buddhism and Sanga?
I like to live long as a normal person (not being a monk). Live long here, I means if possible 100 years. If not, 90s. If not I like live longer than average of people at least. 
I like to live longer but I don't want to lose the opportunities of - 


Having many things to see which make me cheerful and pleasing. 
Listening music which make me pleasing. 
Smelling good things and fragrances. 
Savour what I like and people says the best things I can have in life. 
Touch of aesthetically pleasing woman, touch of delicate fabrics


I would like to follow the practices, rules, dos and don'ts said by Buddha or Buddha's teachings or from Sanga or from a Buddhist monk. The goal I like to achieve is to live longer and heathy (practically live much more longer than current generation like 100 years, 90-100 years). Is it possible instance that I can achieve if I am passing my teenage years? Or If I am not, is it possible for age of child or new born baby by applying teachings, guidance, practices and care by Buddhism, he/she can live longer and healthy for the rest of his/her life? 
Can you point me out any reference about living longer and healthier from Buddhism teachings, book of monk, audio/video recording, web link or Suttas?
Here is a list of a few things you can do to live a longer and healthier life. 


Meditate: Stress will make you age quicker and die younger. 
Eat vegetarian meals: Most meats will cause inflammation which lowers your life-span.
Intermittent fasting or only eating for the first half of the day. This will help you keep thin, slow down your metabolism (the idea is animals who have slower metabolisms live longer than those with faster), and your body has the chance to clean out it's system. 
Put aside yourself and help others. Helping other people makes you active, social, younger, and happier.
Simplify your lifestyle. Buddha always encouraged his followers to live a simpler life, why? Because it helps you live longer by lowering your stress and finding happiness. 
Finish all your work in the morning so you can rest in the afternoon. This is a pretty common practice in the monasteries. 
Don't Procrastinate! Buddha encourages us to keep up with our work so we don't add unnecessary stress to our lives. 
Buddha gave us a purpose in life which helps you live longer. We're not just piles of flesh waiting to die.  
Many Buddhist sects believe in early to bed, and early rising. Life becomes much easier when following this pattern of living. Stress decreases significantly! Less stress means a healthy body. 


This is but a few practical tips given by Buddha, with external sources (supporting) the reasons for why you should follow them. I hope this helps and have a wonderful day!