Cats are going to tend to themselves for the most part. Training can help with the clawing if they go for your sofa/chair/other furniture. There's some special double-sided tape that you can put on stuff to stop them scratching on anything that isn't a designating scratching post. Getting horizontal cardboard scratchers works well too. They pretty much litter train themselves, and an adult or older kitten will already be litter box trained even if they were outside. They're super easy in that regard. The other issue is cables/electrical wires. I put up anything they've shown interest in chewing on. Some cables/wires they leave alone and never bother. Phone charging cables and computer cables are another matter and I make sure they can't get at them if I'm not around to watch them.
Dogs are more complicated when it comes to leaving them alone and require a lot more training. Some dogs have separation anxiety if left alone for too long, too often, or both. Usually a few hours isn't much of a problem, but a daily 9-5 style job can be an issue, especially if they're inside all day with no one around to be with them or at least let them out to potty.