В первом предложении артикль the неуместен. Правилен "a". Во втором предложении более корректным было бы поставить двоеточие вместо тире, после которого также стоит неопределенный артикль "a". Что такое hitretsy мне не очень понятно, и вообще предложение третье предложение неправильно составлено.
This monkey to me presented on the kindergarten termination - I was six years old
Правильно: This monkey was presented to me on the kindergarten termination when I was six years old.
In my hands the toy revived
Более верным было бы не revived, a turned to life.
could laugh or cry, use cunning or be angry.
it's could laugh and cry, be sly or angry
She was with me everywhere.
Игрушка — неодушевленная вещь, поэтому нельзя применять к ней местоимение She. Верным будет It.
The most important that the favourite toy bears with itself is associations.
после important нужно вставить is.
memoirs
memories. Ваше слово будет мемуарами, а не воспоминаниями.
Затем Firstly
die away — такого глагола не существует, и мне даже непонятно, что вы хотели этим сказать.
Самые очевидные ошибки. Не ручаюсь, что все будет правильно после
When Edison was a boy of fifteen he worked as a telegraph operator. He had to be on duty from 7 p.m. to 7 a.m. and give a signal every hour to prove that he did not sleep. The signals were made with a stonishing exactness. One night an inspector arrived and saw Edison sleeping on the chair. He was about a to shake him when he caught a sight of the mechanism on the table near the telegraph instrument. He waited to see what would happen. When a hand of the clock pointed to an hour, the instrument got busy and one level threw open the key while other sent a signal over the wire. The inspector seized the sleeping boy, roused him and fired him. That is why the first of Edison’s numerous inventions was never patented.