1998 Toyota Camry slow acceleration - rough idle and burnin

I am taking the car in now. I will have those items checked. I'll let you know how it goes.
Thanks again

Hello again,
One thing I remembered as I was taking my car to the mechanic, was that about 4 or 5 months ago, my daughter borrowed my car for a couple of days. She brought it back and said "you know more about cars than me, is this smell normal?" I said no and checked under the hood. When I checked the oil, it was pretty much empty. I had never had a problem with my oil disappearing and had the oil, and other fluids replaced at a local fast server oil change place a couple months prior. I added 4 quarts of oil before it was full again and the smell went away. Today the car appears to be a couple quarts low.
I told the person at the shop that it seemed to be misfiring and maybe just spark plugs and wires were an issue but also told her about the oil issue. I said that the car is old and that I am not necessarily interested in completely fixing the car, I just don't want it to die on me while driving. She said I understand, but I am concerned that you may have ruined the engine.
If that is the case, that the lack of oil several months ago and the situation now, indicate that I need to rebuild the engine or something, can you tell me if this is something that is required or can I do something in the meantime, to keep the car going for another 6 months when I might be able to justify a new or slightly used car purchase?
I know that without looking at the car, you can't give me a definitive response, I am just hoping that there is an option other than the engine is dying and could die at any time now. Something just to hold me over and buy me some time.
Any ideas?
Thanks again. Still keep your fingers crossed. Maybe it is just the plugs and wires. There is no smoke at this point.
Thanks again

Thanks again,
I just got off the phone with the mechanic. They removed one of the spark plugs and the car continued to run. They don't believe the oil has anything to do with the issues and they are going to do a compression test. They mentioned the coil pack and that the car may need a tuneup.

Still, I will look into the additive you suggested. I appreciate your help.

Thanks for the info. I will update this issue, once the problem is fixed, just so it is online. I am so glad this is not a major issue. Not quite ready to get a new car ;-)

Thanks

Well, I just heard that the (or one) coil pack, all spark plugs and the wires needs replacing.

With diagnosis - $548.73. Seriously?
A friend and I replaced the water pump in my T&C last month, do you think I could handle the coil pack, etc? I know that spark plugs come pre-gapped but I have a gap gauge (from high school auto shop). The wires don't seem like they would be difficult. I have replace in a different car before.

Prices:
coil pack 171.99
Install 42.69

Spark plugs
9.99/each
install 11.00 each

Wires:
121.99
install 42.69

Diag:
85.37

Thanks