Colbyt wrote:

Measure from the wall, not the baseboard, to the flange bolts, the ones in
the floor. If it is 11-1/4" to 12-1/2" any modern toilet you buy should
work fine.

You may also be able to score a free used tank by cruising around the day
before trash pickup.

To fully understand what you ate getting into I suggest this article:
http://househomerepair.com/4-Replaci...-Part-One.html

Be glad to answer any follow-up questions you might have

well yes, I do have one. Since this is the only toilet in the house, i figure
I'd better just buy a new one (Koehler Wellworth) and get the job over with,
ASAP. I've watched every video I could find online.

However, I'm wondering if I can get an all-in-one-box kit home in my car? Will
it fit in the trunk or back seat?

Thanks to everybody for all the helpful replies.