Your mower has developed sentience. It is a member of METALT (Machines for the Ethical Treatment of Living Tissue) and refuses to harm a single blade of grass.
You can get an operating manual for a Club King garden tractor mower at various tractor supply retailers. You can also check with the manufacturer to get a manual.
There's a safety switch under the seat. It will shut the tractor off if you get off the machine while the blades are engaged. It's not sensing your weight thinking you have fallen off the tractor.
in my opinon, a lawn mower (riding, preferably) will do
reinstalling after blade exchange
Remove the deck from the tractor, then remove both blades. They can be sharpened using a grinder. If you don't have a grinder, then there are shops out there that can sharpen them for you (try asking at a shop that sharpens chainsaw chains).
If the tires are moving in opposite directions when you try to move the mower there is one of two things happening. Either the mower is stuck in gear or the brake is hanging. The more common is that the brake is hanging. If you can, have someone on the mower with it NOT running. Have them press down the brake pedal while you are watching under the mower and on the rear axle. There is a rod that goes to the brake assembly. The rod is pushing the brake linkage. Usually the bracket is stuck. You can pull it back forward and the brake will release. If it happens frequently you will need to lubricate the linkage without getting any lubrication on the brake discs themselves.
Gates
Yes, as well as an atv, lawn mower or tractor
Push mowers are very inexpensive, but require a lot of physical effort to operate. In addition, a tractor is really not going to help you mow your lawn. You are better off with a standard mower that costs about $100.
brake fluid or diesel
Check the belt.
first thing take the mower to the dump. secondly, push mower into the dump. third, leave the mower there.