Well, because you are 14 you do have limited options, even though you create you're own options as Bananas and Raos say, there are still jobs that you can't do because of your age, certain laws might restrict you.
But when I was 14 I had a paper route until I was 16 and then I got a job as a pot washer in a local restaurant whilst still at school, then when I went to college I worked in a factory in the summer time and have done for the past 3 summers.
But to address your issue about working at McDonald's, all I can say is - You are below no job and no job is below you. It doesn't matter where you work, it's money at the end of the day. I used to think like you, working at McDonalds or in factories or what have you would be jobs that I would never do, but when you get older and realise you can't pick and choose the jobs you have, you take anything you can get. It doesn't really matter how sucky the job is, it's always experience to put on your CV and at least future employers can see that you are willing to stick it out with the not so great jobs, motivate yourself and be determined.
We all have to start somewhere.