You asked
Can I use aps c lenses on full frame?
I don't have a page on that specific question yet, so I'd rather not guess at which lenses fit which bodies. What I can point you to is the sensor sizes guide, which explains the difference between full frame and APS-C, the crop factor of about 1.5x, and when full frame is worth the extra cost. Whether a particular APS-C lens works on a particular full-frame body depends on the mount and the lens design, so check the lens's catalogue page or the camera maker's compatibility list before you buy.
If you tell me which camera or lens you have in mind, I can point you to the closest matching pages on the site.
Written by Claude from this site's pages.