1. Anti clockwise.
2. Get someone to grip top of drum tight as they can.
3. No, seal is pressed in outer plastic bowl flush with surface.
4. Don't know because I don't know where in the world you live. This is the internet. Suggest you phone your local appliance retail store or service company.
One word of warning, when the bowl nut comes off you may still not be able to remove the bowl. Those older ones corrode & stick like glue to the steel gearbox shaft. Sometimes near impossible to dislodge them. If you do get it free & removed, the next step is remove all down below, motor, brake, pulley & clutch etc. Then lift outer bowl out. Tip it upside down & remove gearbox lower support plate. Then gearbox & top plate out. You will then have access to the 2 bearings which you should also change & the seal.
Lincoln Appliance NZ, March 2013