oil change help

[barische]

now that i own the ti, i wanna change my oil. i want to change to fully synthetic oil. most people says mobil 1 is good, so i will go wiht mobil 1, but the car is at 83,000 miles , and i really dont know what kind of oil they used before, my father took the car to some mechanic i think every 7000-8000 miles. i live in nj and it usually get around 30-35 degrees in winter and i was thinking about going with like 10w or 15w, i really dont know what kind of oil the mobil makes, so can u guys help me wiht the thickness of the oil. i also checked out the drain plug today and i saw that i dont even need to lift the car. i can get a racket and unscrew the plug.
do i have to get a special tool to remove the oil filter cap. i was thinkin of doing it with my dads wisegrip tools.
can u guys help me iwht the parts i need to change the oil. thanks any help would be awesome. also the car is 1997