We are planning to buy this house. We saw some cracks (7 ) in the basement floor. House is 1997 build. Will it cost a lot to fix those crack or can we do it on our own. Will appriciate a quick response

I am planning on finishing a room in the basement of my 49 year old home in the twin cities. My plan was to use 2x2 furring strips 16” on center with rigid foam insulation in between the furring strips. Also planning on building regular 2x4 walls for interior walls. I’ve never had a water problem in the basement, which is concrete block. Is it correct that I need to cover the furring strips and insulation with a vapor barrier? I’m also wondering what is the best way to attach the sill plate of the 2x4 walls to the floor. My brother told me to forget screws because it takes way to many drill bits to get the job done. Is something like liquid nails strong enough considering the top of the wall will be nailed to the bottom of the 1st floor joists? If not, what would be a good solution? Any comments or suggestions would be appreciated since this is my first project of this magnitude.