layout=the plan, design or arrangement of something laid out

1. A model railway layout.
2. The layout of the apartment was good, but the kitchen was too small.
3. She designed the page layout for the school souvenir

outlay=An amount of money spent for a particular purpose, esp., as a first investment in something

1. We plan an initial outlay of Rs. 50,000/- on machinery.
2. A modest outlay on imported equipment.