Car is running rough and missing and will not accelerate very much.

You could have faulty sparkplug wires, worn out or fouled sparkplugs. The distributor cap or rotor could be arcing cutting our your spark. Check out that stuff and write back with as much information as possible. Good luck. If you want to find a Toyota specialist, here's our directory link for you: https://repairpal.com/toyota-repair-in-mount-vernon-washington