what's wrong with my treadmill?

Okay... so I haven't been on my treadmill in a couple months, but before I stopped using it it was making an unusual clicking noise and it was also producing a burning rubber type smell. I tried to find where the smell was coming from but I'm still not completely sure. Now it won't turn on at all with the magnetic key and the only thing I can get it to do is run for a few seconds after I press the red button that is located near the cord... and that is with the magnetic key out. The brand of treadmill is a proform cross walk (the numbers under the word crosswalk are peeling off and the only numbers I can make out are 2&5... I think it's blank_25 but it could be 25_) I hope someone can let me know what to do, or if anything can be done. It's just sitting here collecting dust and I can feel my ass growing. Help please!
Angie