I am thinking upgrading my Toshiba Satellite C855D from the Amd E-300 Apu to the AMD Pro A6-7050B and was wondering if it would be compatible with my motherboard. I'm mainly worried about the BIOS support and the socket compatibility.
Put your mind at rest. The CPU is soldered onto the motherboard and the sockets for those two processors are incompatible. Two huge strikes against your hopes and aspirations.