My toilet is a kohler low profile. There is not a
Hacked off the old seat? You mean the closet flange that connects to the sewer pipe?
That's the part that has the bolts. They go up through the toilet base.
If you have just a straight sewer pipe now, you can connect a new closet flange to it.
1.Hardware stores sell a rubber sleeve. This sleeve fits over the cast iron, or copper, or plastic PVC pipe, and the new closet flange has a stem that fits down in the sleeve. There are two large hose clamps, that come with this rubber sleeve.
The rubber sleeve is an adapter. It adapts the 4 inch sewer pipe, down to the 3 inch stem on the closet flange. (Toilets are known as a 'Water Closet', hence the flange that the toilet bolts to, is a 'Closet Flange')
Whatever size of rubber sleeve you need to adapt two pipes together, they have it.
The new closet flange is made of PVC plastic.
(Poly Vinyl Chloride)
The flange itself is about 1/2 inch thick, and has provisions for bolts. (Use Toilet Bolts, and nuts)
Be sure the closet flange sits flush to the floor. The 1/2 inch thick rim of the flange, sits on top of the floor. The flange is then screwed to the floor with countersink head screws. The slots allow the bolts to just slip in.
IF, the flange Does Not sit level on the floor, and the area for the toilet base is not level, you need to make a flat, level surface!
Do Not half step this, or you'll have a toilet leak from now until the time you fix the floor!
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