I got a cremello a little over 3 months ago. He doesn't need much in the way of extra care compared to the darker horses I've leased over the years, but he is stalled except for 3-4 hours of daily turnout.
When it first started getting sunny, I noticed his nose getting a little pinker than normal a couple times and put sunblock on him. I haven't needed to put sunblock on him in weeks, though. Cremellos have pink skin, but it is still lightly pigmented (unlike the white areas of pinto horses) so they're not quite as photosensitive as many people expect them to be.
I also got a fly mask for him, both because of flies and because his light colored eyes might make him more sensitive to sunlight.
Cremellos' hooves don't bruise any more easily than other horses. Can't tell if your horse has white hooves or not (mine has white markings on all feet and I don't know any other cremellos, so I'm not actually sure if cremellos have white feet if they don't have white markings...) Regardless, white feet aren't any softer/weaker than black feet; both will get bruises if they get banged around, but white feet will show bruises more obviously.
Your new boy looks a lot like mine did when I got him- it shouldn't take long to fill him out. Mine already looks like a completely different horse