1995 Honda Civic oil always gone

After driving a few hundren miles the oil is mostly out fo the car and no real leaks are present, there is some white smoke out of it in the morning (tail pipe); the previous owner paid 533.33 for labor to R&R cylinder head and adjust valves

so what can I do, we paid 3200 for it, and need it to last another two years until our son gets out of high school