My oil heater is old

We have lived in this house for quite some time now and a lot of things need to be fixed.

I know the house was built in the 1960’s and a lot of the appliances are wearing out.

Our dishwasher leaks quite often and the two of us need to dry the water under it always. We also have an old washing machine that makes a loud noise when it’s running, and these machines are just like people and they get old and worn out over time from being used each week. I know I need to dig deep and buy some new ones. We have an old oil furnace that has an oil tank outside of the house and the two of us need to fill it weekly. I know it may be time to invest in a new a/c and gas furnace or possibly just buy a new fireplace. The problem with a fireplace is that there are no trees in our area so I would need to go to the store to buy wood which can be quite costly. I was thinking of replacing the air duct and seeing if that helps with the heater. Maybe there are some leaks in the vents and if I tape them up it will run better. I’m not an a/c expert and I know really little about repairing gas furnaces even though I may give it a shot to save some money. My associate said he would come over and help me repair things even though I have not seen him yet. He is an Heating and Air Conditioning expert so it would be good if he did come by.
a/c tune up