Hello, I am in a wheelchair.
Too bad, it is  used when walking is difficult or impossible due to illness, injury, or disability.
Yes it is. I was paralyzed in a car accident many years ago.
They come in various shapes and formats so as to meet the need of the user
Yes, mine is rather basic, and has experienced much wear and tear, but it works for my needs.
oh ok. Some have  specialized seating adaptions, individualized controls, some even have technology friendly features these days 
Yes, fortunately for myself I still have use of my arms, so controls are not needed.
The history of it's use date as far back as between the 6th and 5th century BCE.
Wow! I had no idea they had been in use for such a long time! That's actually rather fascinating.
There are two types power propelled and self propelled wheelchairs