If you want to come to Canada on a work permit, you first have to secure a job offer from an employer in Canada and that employer has to obtain an approved LMIA. Once you have the job offer and approved LMIA, you can then apply for a work permit.
It is next to impossible to find employers willing to go through the LMIA process.
There are also many scams out there. Do not pay money in exchange for a job. These jobs are fake.