@AnxietyCat220 Surface Pros aren't gaming laptops, and I wouldn't expect one, other than maybe the highest-end model, to run all Sims 3 packs together, at least not very well. But what kind of performance you might get depends on the specs of the particular model you buy. So it would help if you could link the configuration(s) you're considering, rather than the line overall.
The issue is that Sims 3 doesn't run as well as it should on lower-end computers, and sometimes it barely runs at all. It can also overheat a laptop much more quickly than it should. So there's no real way to say sure, this hardware be fine to run the game on medium settings—it might, or you might get constant crashing, or you might even overheat and damage the laptop.
What do you want out of the laptop, and how much are you willing to pay? If you want something lightweight and portable, your options are somewhat limited, either by price or by performance. But I'd be happy to look for some options; just list your budget and country, as well as the other details that matter to you.