Your dish settings with exception of alignment on the pole for true south should be ok providing it was an operational dish at one point with current settings BUT analog
C Band is far more forgiving than digital so you may need to tweak it a bit once you get going.
Settings in the receiver are going to depend on what you are doing. If you are setting up a C Band sat then you would use 5150 for the LO. If I am not mistaken the 621 is a standard on the Ku side so for the Ku sats you would set the LO at 10750. I believe the 621 uses 22Khz for switch between the two bands with on for Ku and off for C. You will need to set this accordingly as well. If the lnbf is a 621-2 (I think) it would be UNI for the Ku LO and it uses DiSEqC ports as the switch.
The UNI Ku BSC lnbf is the one I have listed in my signature. Have you checked the holes on the dish? Did it have a single C Band lnb on it or a Corotor II w/ two lnb's? Depending on your location you want to be able to see all the way left and right of your location. This means you would want the
actuator extended halfway when pointed at true south. If you are limited in one direction you would offset it as it is easier to push than pull. What this means is as an example if you were at 123 you would not need much west travel so set it up as the actuator would push it's way back to 123 from the east and pull from the west since there would be few sats west of 123 you will get.
If you are blocked by something on one direction (trees, building, etc) same applies.