I don’t know the weight, and don’t have an option to weigh it, and I now have it loaded up. But I’d say it is heavy like maybe 60-70 pounds. Perhaps more troublesome really, is that it’s a bulky big box. The store will help you load it. I think you might want to ask a friend to assist with getting it out and set up. I have found it to be a great chest in all regards.
Available in the store
I have had several Husky Tool Boxes and I have had bearings fall out but what I have learned was that its really my fault from having too much weight in the drawer or and obstruction from too much crap in the drawer that gets the drawer caught and you try to slam it shut or jerk it open and it pulls loose the slides on the side and they bearings fall out. The latest one I have has not been a problem because I make sure not to put too much crap in the drawers or put stuff that is too big. Follow the recommendation of how much weight is allowed. You can't not just keep stuffing more and more stuff in the tool box and think its going to hold up or else buy the more expensive tool boxes that have to slides on each side of the drawer so it holds more weight.
Made in China of course
These are real basic locks. All you need to do is take the number code off the front of the lock and take it to a lock smith and have one made. It not that expensive.
Sorry, I've not had this issue. Very small rubber bumpers would resolve your problem, and are available at Home Dept. I used these for my kitchen cabinets and saved a bunch over buying new soft closers.
The drawers are designed to be removed, so I would see no problem with your idea.
It fit in my Chevy Equinox with no issues. I am sure you will be OK. Just need an extra hand may be helpful.