The prime minister told the parliament

[Bassim]

I am wondering if my sentences are grammatically correct.

The prime minister told the parliament that the country couldn't afford to have so many young people without a job. He promised to do everything to create a proper economic climate and give his support to the companies and businesses which give a chance to the young people.

 

[teechar]

I would use "out of work" instead of "without a job"; "do his best" instead of "do everything"; "stimulate the economy" instead of "create a proper economic climate"; and "provide tax breaks/incentives to businesses which took on young people" instead of "give his support to the companies and businesses which give a chance to the young people."

Note also that you say "told parliament" (without "the"). ;-)

 

[Bassim]

I will repeat my sentence after teechar's suggestions, just as an exercise.

The prime minister told parliament that the country couldn't afford to have so many young people out of work. He promised to do his best to stimulate the economy and provide tax breaks to businesses which took on young people.

 

[GoesStation]

Now that you've removed the definite article, Parliament is a proper noun. It needs a capital P. The last verb in the last sentence should be in the present perfect.