Timing belt run a 1/6 inch off the front of the Cam gear

Bad fuel pump in the tank.

Hi Jude, I suggest that you take the vehicle for a diagnostic scan, paying special attention to the crank shaft and cam shaft pick up sensors, Check the wiring to both units and make sure of the continuity. Sometimes a broken cable inside the insulation can have the effect of behaving that way. Regards John

Cleaning your throttle body is irrelevent to the oil leak behind the timing cover. There are 5 seals that can leak behind the 2000 accord timing cover, the oil pump, crank seal, cam seal, and the 2 balancer seals. Most of the time its the front balancer seal that has popped out and will need to be replace and have and retaining kit install. Its actually very common on that engine. I highly recommend taking it to a professional to get repaired because timing the 2 balancer gears with the cam and crank is very tricky even for the mechanically inclined. Since the timing belt and the balancer belt has to come off and is probably soaked in oil, I recommend replacing those as well.

Check and see if timing belt jumped . The belt may be missing a couple of teeth

Assuming you have the 2.3 L 4 cylinder engine, the CYP sensor [Honda does not call it a camshaft sensor] is located in the distributor. It also has 2 crankshaft sensors, located down at the front of the crankshaft. You need to remove the timing belt covers to access those.
FYI, P1259 is a VTEC system [variable valve timing] malfunction code. First step would be to change the engine oil and filter. Dirty oil can cause the VTEC solenoid to stick.

not likely

check coolant level, sounds like it's low,...

http://www.vidzshare.net/videos/EmasxgJdXJ8/how-to-change-timing-belt-in-a-vtec-honda-accord.html

Go to the above link and get a video explanation of how to replace timing belt in all accord with vtec engine...

It has a timing belt

Rotation is clockwise. The writing faces the tire.