Is it dangerous to take lorazepam with tramadol for pain and depression?

It depends on dose. Lorazepam and tramadol can but generally don't cause problems breathing. More commonly both may cause sedation and unsteadiness which tend to be increased with age. Impaired kidney function increases the chance for side effects. If you are otherwise healthy and you are taking low doses as prescribed by your doctor, the combination should be safe.
Yes. The combination may increase the risk of CNS or respiratory depression and psychomotor impairment.