Hi there. Burning in the toes can be quite a result from compression l5-s1. You have benign prostate hypertrophy which could cause benign prostate enlargement. This could be causing elder males from quisitve reaction and would be causing urinary stasis. This could cause urinary tract infections and hence a better scenario.
You need to be ruled out for diabetes, hypothyroidism, multiple deficiency symptoms. take care.
Burning feet or any foot pain CAN come from the lumbosacral spine being abnormal, the nerves that come out of the lower spine go down into the legs and feet, diff levels of vertebrae produce diff locations of discomfort.
I am not sure about your prostrate trouble having anything to do with your feet, but I can tell you that if it burns when you urinate, that likely means you have a urinary tract infection, which can be cleared up by antibiotics, so see a general doc about that. Also, burning feet can also be a symptom of diabetes, so have that doc check your sugars, too.