i dont understand your first question but as for your second, Just make sure you are lifting a weight that on the 2nd last and last rep its difficult to get it up. So for example if u doin 8 reps make sure the 7th and 8th are hard to get up or if u doin 3 reps that the last is hard to lift.

This is what id do for novice:
8 reps:60-65% 1rm
6 reps: 70% 1 rm
5 reps: 75-80% 1rm
4 reps: 85% 1rm
3 reps: 90% 1 rm

etc this applies to deadlifts as well. Ideally what you want to be doing is adding weight to your lifts each week. What i did which really worked for me is before i started doing the squats i estimated my max at 110kg but instead every week i always added 2kgs~ so by the end when i finished the 8 weeks and my set of 2x3 ended up being 117kgs, 7-10kgs more then i expected my 1rm to be and that was on sets to.