Devil some people might recommend Arduino if you are a casual hobbyist. In either case, if you want to avoid PCB design and soldering, then you might want to invest in a development kit. (Or even if you want to move your design to a custom PCB later it still might be easier to start out writing your software on a development board any way).
There are a thousand different things you can buy to get started, here are just a few examples:
As white and nerdy said we would need to know more about your application to be able to recommend an exact PIC chip, Microchip has literally hundreds (or possibly thousands) of different PIC processors for sale.
I believe there was a selector tool at one time on the microchip website. you put in the basic variables of your project and it would give a recommendation, but its been a while.
Yes the microchip website still has that product selector. If you are already familiar with microcontrollers then definitely go straight to the Microchip website here. "Parametric search tool":