Keep, Clean, Kasther, or Sell?

What do I do with these items? Clean them? Kasher them? Sell them?

Becher — Clean and kasher through hagalah.

Betty Crocker — Clean from visible chometz and put away with chometz dishes.

Books / Seforim — If during the year they were used while eating chometz and you’re planning to use them during Pesach, they need to be cleaned and inspected (at bedikas chometz). If you’re not planning to use them during Pesach, cleaning and inspection isn’t required.

Car — Requires a thorough cleaning (of all accessible areas) and inspection. If car will not be used on Pesach, the car may be sold through mechiras chometz.

Cookbooks — Put away with chometz dishes.

Countertops — Stone, marble, butcher block, and quartz counters (without cracks where food can be trapped) may be kashered by cleaning and scrubbing well with water and soap (making sure to scrub every seam or crevice) and then pouring boiling water from a kli rishon over the entire area. If done correctly, covering the counters is not required, but still preferable. Ceramic, glass, Formica, and other plastic materials shouldn’t be kashered for Pesach and covering them with water-resistant covering is required.