Kiszka Kroitschov

So I just picked out my first house and I cant even figure out how to get in the damn door.. And if I walk across the way to the house next to me I see a green message stating "Thanks for your purchase. Please click me to open." but thats not my house and there is nothing to click... Help? >__<

So they have a deal where if you buy a premium membership, you get $1000 linden and $300 a week or something, and I was thinking about trying it for a month, but what i want to know is if I'll lose that money or if it'll be inaccessible when my premium ends??