My apologies as these are probably answered in other threads, but searches aren't getting me to answers very efficiently tonight.

If I book an LH flight in C as a UA codeshare SFO/FRA:

1. Do I receive flight miles AND 1P credit AND purchased business class bonus?
2. Do I check in at United or at LH?
3. Do I have access to RCC's or LH lounges or both?
4. Is there any benefit to booking the LH flight as the actual LH flight rather than the UA codeshare?

Sorry about this again, just can't seem to find all the detail in one place.

Thanks!