Be warned that painting bricks is a very time consuming affair if they have deep recesses. Bag them first.
We are half way through a cosmetic renovation and, doing it ourselves, it takes a long time, trying to work around busy periods etc.
We are tiling over floor tiles in the bathrooms and re-grouting the walls. Along with paint, carpet, new electrical fittings and soft furnishings. They are coming up a treat....not completely modern but much fresher and cleaner. With a leasehold be careful not to spend too much.
Our method of doing each room evolves with each one done.