Is this text are well correct?

Laurens Molina is a really true champion. He was born in San Jose, Costa Rica. Due to a congenital disease, doctors had to amputate both of his legs when he was just a baby.

He never gave up, and walked for ages with the help of a his heavy prosthesis for a long period. After several years, he had to stopped using his prosthesis due to a problem in one of his legs and had to started using a wheelchair.

One day, then he looked saw some people in wheelchairs playing basketball, so he decided to started to playing as well and then he soon moved on to began racing on the speedway.  He signed into his first race (when?) in Costa Rica and he has never stopped,  then internationally.

In 2000 he was able to go to a race in Spain, and there with the supported by of strangers(?) he won the first place out of over five hundred competitors. It was there he knew realised there is were not limits for keeping him to keep from his dreams.

After that, he prepared to go went to the Olympics. He didn't win any medals, but he was chosen by Hanger's Company between from out of five thousand disabled competitors to receive a gift: a pair of mechanical prosthetic legs.

Since that time, he has competed in over one hundred marathons and he has won a lot of many medals. He still works with his parents (? this is the first mention of them) and he gives talks to on overcoming one's limitations.

I hope the corrections are helpful enough. Pay attention to tenses and punctuation. Good luck!