Yeah, your dad's right. It doesn't matter whether or not you have anything on your resume, it's something that a lot of employers look for. It also has sections on where you can list your skills, such as are you good with microsoft programs, typing speed, or things like that. I actually have never made one/have one, but I will for a co-op program in the next school year, but they can be pretty important. Some people may not care at all, but some really do.
You can't just be like "I want a job" and expect that SOMEONE will hire you after you send in the basic application. You should also try talking to people/other employees. If you had to drop out because of financial reasons, then any job you can get, is better than none. You can't be picky, so talk to people and get on their good side.
"Even a broken clock is right twice a day."