I'm not exactly the scenario you're looking for, but I am in MN, so I'll share my experience. I created a reservation back in Feb and was waiting to lock when we got a call from our dealer (Schmelz Countryside) that they had a cancellation a couple weeks ago. It was a gradient, which I didn't really want, but they offered it at MSRP. Since we had no idea how long it would take for our reservation to go through, I jumped on it. I would not have taken it if had they charged over MSRP.
I can't really speak to #2, since that didn't apply to me. Seems to me like that's an offer from corporate, so I don't think the dealership is really out anything by honoring it, so I don't know why they wouldn't, but I could be wrong there.
As MNMadMan mentioned, there is a $75 EV fee in MN. This is a yearly fee with your registration that is intended to offset the fact that you're not paying gas tax to pay for roads. Other fees were pretty typical for a new car purchase. All told, I had about $850 in fees, with the registration and document administration fees being the bulk of that. For a RWD Pro, the registration fee should be less, since it's based on the price.
I am on Xcel. I haven't signed up for their TOU rates... yet. I thought I would watch to see what our usage was like. Xcel has 2 different plans for this in MN. The first they call Time of Day and all of your electrical use is subject to the time-based rates. The kicker on this one is that while your weekend and night rates go down, your weekday rates are about double what they currently are. So far, this one seems like it would be a wash for me, but I have less than a month's worth of data, so I'll re-evaluate as time goes on. Xcel's other plan is called Limited Off-Peak. For this one, you get a second meter specifically for your off-peak circuits (so some extra wiring involved there). The off-peak rate is a little cheaper, but the peak rate is higher than Time of Day. The other downside to this one is that the off-peak window is smaller (10 pm - 6:30 am vs 9-9 for Time of Day) and is enforced 7 days/week. However, even paying normal residential rates, we're saving a lot in daily costs compared to the Prius it replaced.