Hi Seb.
If the wheels are 98 pcd then they will fit but you'll have to check they are ok on full lock that they don't rub as I'm not sure about their offset.
For the steering wheel I have no idea. But if I had to guess I would say it more than likely would fit because the indicator stalks are the same layout. Personally I'd go for a Cinquecento sporting wheel as its a straight swap and looks like it came on the car.