Does my yearling have long pasterns?

I mean will he grow into them and will he be able to do the things I listed before?

Does that mean he will grow into them?

He will most likely grow into them and will seem to be fine for what you would like. It is not fair to ask of too much of a critique since horse's bodys change very much so until they are about 3, which is why I would personally never start a horse until 3.