Ive dealt with leaky basement since I was a child. They seem to be typical. Though they should never be ignored as the problem will grow in to a major foundation issue. Its best to identify the problem and address it while it is small. This is not just in the basement. This also includes your garage, pool, and patio.
Most are caused by the drying shrinking, thermal movement of the ground. If you do not fix the cracks while they are small. They will widen and get worse. Then you will have to do much more than a simple epoxy job. You may have to run tile drainage or do some kind of excavation. Foundation cracks will also hinder the value of your home.
Lucky for me they have inexpensive epoxy crack repair kits. These are cost effective and a homeowner like myself can get the job done. Poured foundation cracks may be repaired by using low-pressure injection of an epoxy or polyurethane foam material. For the repair of concrete floor cracks, certain epoxies and polyurea materials exists, suitable for such slab repairs.
Either way, the repair of concrete cracks in either the foundation or the slab may efficiently and effectively be completed in as little as an hour or more.
So, did you buy a fixer upper, or did you buy a fixer upper??
Interesting to know, I don't think we have any cracks in our basement. That just doesn't sound like a fun thing to have to deal with.