Yes that's what the flange sit on and get bolted onto that is why if you remove the toilet/flange you will see a hole in your floor
I am paraphrasing to be sure I am answering your question... I think you are asking... "How do you prevent a loose toilet seal?" answer: Most seals, for a toilet, are a problem if the floor is not level or the toilet sits on a non level surface. If the toilet moves side to side or front to back then the seal WILL fail! Additionally, if you have removed the toilet you must ALWAYS install a new seal.
The toilet itself is easy to install but the plumbing would have to be rerouted by a professional. You just drill the floor and it's 2 bolts.
The time it takes to assemble and install a new toilet is about one hour.
When you purchase a new toilet seat, it is going to come with the instruction manual as to how to install the seat, when you get it in your home for installation.
The transmission must be removed to install a new clutch.The transmission must be removed to install a new clutch.
The flange is there mainly to anchor the toilet to the floor. There is a replacement or repair ring available to fix this kind of problem. They are either brass or steel. Cut the rest of the ABS flange off flush with the floor and install the new ring by screwing it down to the floor with either concrete plugs and screws or there are screws available that will screw directly into the concrete. Make sure the new ring is in the right place so that the slots for the toilet anchor bolts are on the sides of the hole.
Tear up floor. Install new floor......
You need to hire a plumber to properly install a new toilet. There are many issues that may arise if you try to install it yourself. Make sure you know the requirements such as shutting off the water before doing it.
Sound like you have a clogged toilet and or a clog in your main drain under your toilet. Shut off water supply to toilet remove water from toilet tank. Puchase a wax ring for your toilet prior to disconnecting toilet from supply line and floor bolt on the right and left of your toilet. Remove toilet from floor if water is standing in pipe under where toilet was this is where your problem lies. If no water or clog present, turn toilet on side and lokk in hole at the bottomof toilet. Clear was is stuck in toilet clean off old wax ring install new one and put toilet back together.
A lot of money.
This will involve removal of the toilet from the floor. You will need a new wax seal kit which comes with new bolts. The bolts are actually attached to the top of the receptacle ring in the floor. They just slide out.
Remove the toilet from the floor, locate the broken tip, and replace the toilet. Don't forget the new wax ring.