I want to know is it possible to use this type of tileset to animate a platformer charecter
I don’t understand very well but when I see the image I wonder:
Now if you are going to use it in a game that you will sell, I don’t think so.
You can do is modify the sprites and create your own character.
Not yet. You can follow the card and vote for it on Trello.
It’s called spritesheet animation i guess.
Take a look here, an user have made a extension for it.