EM10 has a 14-42 kit, not sure if there is a kit for EM1.
Adapter is only applicable if you're using lenses not made for m4/3 mount. If you don't have any of those and are not planning to buy them, you don't need adapters. I think most mirrorless systems have adapters that enable you to mount lenses of all sorts of mounts, but unless you already own lenses with other mounts, you shouldn't worry too much about adapters, and there should be very little reason for you to buy such lenses solely for use on m4/3 cameras.
Most people I think get the adapters for mounting old manual lenses which have very large apertures (e.g. Leica 50mm f0.95), or simply old lenses which they owned for use on their film cameras. Other than that, I don't think there's a particularly compelling reason to get lenses meant to fit on another mount (e.g. Canon 70-200 f2.8) for use on a m4/3 body, since there are usually equivalent lenses for these.
They have two version, one came with kit lens and one sold for body only. So when you request for quotation do spec whether you want it to come with kit lens or not. Also, do note that for EM1, they have a couple of different kit lens. You can choose the cheap 14-42mm kit lens, or the slightly more expensive 12-50mm kit lens or the excellent but most costly 12-40mm f2.8 kit lens. For both EM1 and EM10, I do believe that there is a kit that came with both 14-42mm + 40-150mm lenses. Do note that the 40-150mm lens are not the expensive but excellent PRO lens.
As for adapter for other lenses, yes, they have adapters. But different adapters to be use for different lenses. Olympus already built 4/3 mount lenses (note, it is 4/3 and not micro4/3) and there is an adapter to adapt these lenses to new m4/3 camera. These lenses will retain all their AF capability and the m4/3 cameras can detect this lens as per normal. Only issue is that the AF speed would drop tremendously for these lenses.
As for other lens, even with adapter, you couldn't detect the lens, it can still work, but you cannot change aperture of the lens from your camera and there is no autofocus. Plus, unless the adapter had a danelion chip built in, your camera cannot even give AF confirmation.
For starter, I would really advise against going this far. Learn to walk first before jumping on to the next step.
Thanks for the information. I just want to check if the Olympus EM1 or EM10 need an adapter for the kit lens.
Are you referring the 40-150mm lens to ZUIKO DIGITAL ED 40-150mm F4.0-5.6 or M.ZUIKO DIGITAL ED 40-150mm F2.8 PRO?
Just go for EM-5 with 12-40mm F2.8(each item can be seen at BnS section) as it would be good "kit" for you to walk away with bigger smile on your face and happier person shooting away.
Thanks for sharing.