Can someone tell me how to make a Garry's mod DarkRP server?

Take the money you have.

Go to a server host like GMCHosting.

Buy a server.

Install stuff.

Congratulations, you are a DarkRP owner.

You give me all our money

I "set up" a server for you

You fail because there are so many others out there and yours won't be that unique, especially because I set it up

Cry

For 3 payments of 99.99 I will install DarkRP for you and make jobs.

don't, save your money. Buy a pizza or something