You need to open and have four functioning restaurants
Your first objective is to open four restaurants. Sadly, the budget is rather limited (only 70,000$) which means that you have to start the mission by limiting your costs. Hire the cheapest employees and choose restaurants with the lowest rent possible. You should also try to have two shifts per restaurant at best. You can also invest in a car with pizza - it has low costs but it can give you a lot of money. It is important to rent restaurants first and then buy furnishings for them because the competition can buy those buildings before you get them.
You can attack a gangster that is moving towards your restaurant
Your restaurants are open. It is time to "inform" your competition that you are here. The objective is to perform five successful acts of sabotage in restaurants that belong to Frodato family. Select the nearest restaurant and hire a gangster. In reality you only have to visit one restaurant and destroy its kitchen and guest room. However, the competition will try to do the same. They can send their thugs to your restaurants. You have to defend from five attacks. You can notice a gangster icon displayed on your map. Send your "assistant" to that place to get rid of an unwanted guest.
Use a pizza car to sell 5 pizzas in different locations
Your new objective is to sell 100 pizzas. After that, you have to make five more sabotages and to defend from five attacks on your restaurants. The best way to do that is to place thugs near your every restaurant and send one to the nearest restaurant that belongs to your competition. Then, you have to sell 5 pizzas from your pizza car. Select a spot with the biggest number of potential customers, add a pizza to your menu and set working hours. Move the vehicle to a different place after completing this objective. Adjust working hours and sell 5 more pizzas. Repeat this process one more time to complete the mission.