The Disney Springs Hotels do not come with Extra Magic Hours or 60-day Fast Passes. As for the buses, here's a copy/paste of an answer I previously provided from a similar question. Feel free to ask if things need more explanation.
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It's a shared-bus system, with each bus going to two theme parks. In my experience one bus does Epcot followed by Disney's Hollywood Studios. The other bus does Transportation and Ticket Center (transfer to boat/monorail to Magic Kingdom) followed by Disney's Animal Kingdom. But, I've also heard of different combinations at times.
The service is run by Mears Transportation, which is the company that has partnered with Disney for decades.
The shared buses make it an imperfect system. But, it's much better than many off-site hotel shuttles that only have a few trips each way and/or only go to one theme park and require guests to transfer via Disney buses to get to other parks.
Considering that the cost of a Disney Springs hotel is often hundreds of dollars less per night than a comparable Disney resort, it's worth the extra time it takes to get to the second park via the bus. (You could take cabs and still come out ahead in most cases.)
Here is a scan of the information provided when you check in.
