Speeds: count the number of cogs in rear and number of chainwheels (cogs) in front; multiply one by the other.
Steel frame, probably high-tensile unless there's a tubing sticker on the top sloping tube or the seat tube of the frame.
It's a ladies' frame; model will probably be impossible to find unless it's one of the decals on the bike.
I'd say late 70s, possibly early 80s; more probably the latter.