I'm currently sprucing up an old bike I've had in the garage for a while. I thought it would be a good way to practice and improve my bike mechanic skills. The crank arms seem to wobble quite a bit and from a bit of research this seems to point to bottom bracket problems. I'm currently trying to remove the crankarms & bottom bracket but I'm not sure what tools I need. Would anybody be able to help and provide advice? I've attached photos to show the bike in question.

Thanks in advance!