For the boots, you will get some wear.
Whether to worry about it depends on how much of an investment these boots are to you and how often you ski.
1) Were these super custom fit and you spent a lot of money on them? If they were just off-the-shelf and not really that expensive, you may just let it go, and by the time the heels/toes wear out you'll want new boots anyway.
2) Do your boots have replaceable heel/toe? If they do, and you see yourself wearing them through, you may want to consider buying and stashing the replacement heel/toe parts as it's reported they get harder to find the older your boots get.
If you do want to protect your boots, some options are you can just walk in street shoes and then change to your ski boots in the lodge. You can use a locker or some mountains are a bit more welcoming to stash a bag or backpack.
There are also cattracks devices you slip onto the bottom of your boots-but then you have to stash these somewhere too while you ski too.
B) The topsheet scuffs. These happen. It's just cosmetic like paint on your car, so it just matters if you care about them. If you're getting a lot of them, this maybe an indication of poor skiing or poor ski care if you're crossing your skis a lot or smacking them on the lifts or other things. You can use car wax or other car-paint products if you want your topsheets to be shiny.
Skis are just equipment that doesn't last forever, so don't feel guilty about using them.
Better to wear them all the way out having fun, then to just have protecting the skis nagging you all day long.
C) Wax (for the bottom of your skis)-it depends. Search and read other threads on this.