Drywall – Are 4 toggle bolts enough to hold up a 32in TV

If you are concerned about the weight an easy solution is to put a sheet of plywood (or nicer wood, if it will still be visible once the TV is in place) across 3 studs. Secure it with 2 screws into each stud. Then screw the wall mount into the wood.

Doing it this way will definitely support the weight of any TV you might try to mount. And allows you to mount the TV exactly where you want it without worrying about where the studs are.

You can paint over the wood to make it blend in with the wall but in most cases it ends up nicely hidden by the TV anyways.

Toggles and other heavy weight drywall anchors can be suitable for TV mounts when the mount is flush. Or toggles in to metal studs. Since the load is mostly shear and not pull-out, this is fairly safe. (Provided the drywall is thick enough, the anchors are installed correctly, the wall is properly supported, and lots of other considerations too numerous to go in to here.)

However, adjustable, articulating or arm mounts should never be used on just drywall or metal studs. No matter what anchor you use, drywall and metal studs can not handle the pull out force applied when a TV is extended or tilted away from the wall.

So either get a flush mount, or open the drywall and install appropriate wooden studs.