1.The advertisement is for a flatmate.
2.The person who wrote this advertisement is Ellen.
3.The advertisement starts with the name of the city where the house is located and the reason for this advertisement.
4.The advertisement ends with the person or number to call if you're interested in renting.
5.Yes, the detailed description is about the interior of the house and in the general description there is given the name of the street and what day and time you should come to see the house.
Mam nadzieje ze pomogłam :D