I don't know what you computer configuration is like, but on some websites I see that the Toshiba Satelite P755 usualy comes with a dedicated NVIDIA GeForce GT 540M GPU. This GPU has support for OpenGL 4.0, which will be compatible with the wanted OpenGL 3.3.
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You should look into the Device manager > Display adapters if anything else than the Intel (R) HD Graphics 3000 is listed there. There could be some display adapter setting in the bios / uefi interface as well. I am not a laptop user, so I can't give you more advice on this.
If there is no dedicated NVIDIA graphic adapter already present, then there has to be enough space in this laptop for such an uprgrade as most of such computers have one.
CPU configurations are independant of GPU configurations, though generally better CPUs are paired with better GPUs. Changing out a GPU, or adding in the case of integrated, in a laptop is most likely not worth the money given the required form factor is not off the shelf... At over 10 years old, a whole new laptop would probably be cheaper than trying to source a GPU...