1995 Ford Escort Engine oil

Engine Performance problem
1995 Ford Escort Two Wheel Drive Manual

I recently bought a second hand car from a dealership. It seems to be running fine. Just before I bought it the man at the dealership ensured me he had allready checked all the fluid levels and topped up any that needed it. I recently checked my oil level and found it to be quite a bit below the first marker. Being a second hand car it did not come with a manual. Can I just top it up if so what sort of oil should I use. Also the engine coolant level seems a bit low. Do I top it up with anti-freeze or anti-freeze and water. Thnkyou for your time