No, you cannot. For either component. You have needs that are not possible to fulfill with your current laptop. A new laptop is your solution.
Most laptops are not upgradable to the extent you ar looking at. We would need the exact model to tell you what your upgrade options are. Or better yet, call the people who made it (Toshiba) and ask them. They can provide more details, including exactly what CPUs are compatible with the motherboard and BIOS in that machine.
If you would like to play games on a laptop you will need to buy a different laptop. There are many laptops suitable for playing many games on at very good to ultra graphics settings.