Apply for one.
Yes. You are required to have it on you whnever you drive and show it upon request of law enofrcement.
You can change you Algerian driver licence to French licence if you have proof of address and get your licence translated to French and of corse there is a fee to be paid. Kind regards.
Go to your local DMV agency and ask them to run your license into the system. There are no publicly accessible websites to do this.
now the correct age to get a driving licence is 17 years old.