takes a while to come up to temperature with low coolant light on

I have a 2000 chevy impala and it takes a long time to warm up and the temp gauge doesnt move, and low coolant light comes on frequently and i put coolant in it. The low oil light comes on frequently and I get it checked and it needs oil 2 weeks after an oil change. The car gets warm temp gauge just doesnt move and the low coolant has came on twice in the last 30 days. The oil doesnt have a leak but the low oil light is coming on frequently.