1996 Lexus ES 300 Oil leak

Hi! I found an oil leak and tried to diagnose it. My car is the MCV-20R model and has a 1mz-fe engine. I Checked under the engine and saw an oil leak that looks sludged to tell me its been there for a while. Primarily centred around the area on which the power steering pulley on which the vbelt/drive belt runs. See pics attached.

However, the oil level in the dipstick is at F (full) level and the car was driven for 600 miles by my friend after I purchased the car.

I washed the engine to check for exact location of oil leak/s. There is lesser oil dripping now but the car was driven only 2 miles after the engine wash.

Some evidence of where the leak/s seem occur are
1) Slight leak from the valve cover seal
2) Near the power steering pulley as mentioned earlier but also a place which seems to connect to the right front wheel axle.

Any one who knows or has had this problem before.

Please help.

Paul