Welcome
1. These test results are way off...as Marty stated, how old are your testing chemicals and where are they stored? If you have a nbor or friend that has 1 yr or less and kept inside chemicals, I suggest you two test your water w their chemicals then post back.
2. Yes, you need to drain for sure if those results are correct...and, before you fill your pool, scrub and clean
3. Before you fill your pool part 2, test your fill water for pH, CH. This can help immensely on how to prepare your pool
Post back and let us know