Introduction

こんにちは！僕の名前はサムエールです。１６歳です。

※Fer -san and Ryoko-san are right. 

※The hiragana of "wa" in"konnchiwa" is "は". Even though the pronunciation changed, we still the traditional hiragana to understand it a particle as the same as "へ" and "を".

※"と"

Introduction

こんにちは！僕（の名前）はサムエールです。１６歳です。

※Fer -san and Ryoko-san are right.

※The hiragana of "wa" in"konnchiwa" is "は". Even though the pronunciation changed, we still the traditional hiragana to understand it a particle as the same as "へ" and "を".

※"と" is used between nouns. "And" in the begining of a sentence is "そして". But "僕（の名前）はサムエールです。そして１６歳です。" is a little strange.