Baking soda and vinegar can clear and unclog some toilet clogs.
However if the toilet clog is more severe then you may need to use a toilet plunger, toilet auger or if it's really severe you may need to replace the toilet.
The clog may also be down the line before it reaches the actual sewer line to leave your house or the clog may be between the toilet sewer line and another part of the sewer line.