welcome to the forums. yeah..change the oil.. change the oil filter...make sure you do not put the oil filter in backwards !.check the front and rear diff oil, check to see if your brakes needs new shoes, check your battery post for corosion, check your cv joint boots for any cracks/tears..repack them with grease if they haven't ever been done ?. grab the front racks from the side where the tire is..pull it to you...is there alot of play in the front in ?..means your front knuckle bearings might need checking or replacing ?..do the same on the back..check for any side to side play..if so..means your rear axle bearings are getting bad. with some wd-40 < this is what i use >..spray the ends of all your cables. there is so many things i can tell you to check..but these are the simple things.