Where to live? Leasing Agents? Real Estate Agents?

[David Gotsill]

Hi All - I may soon be relocating from overseas to the San Francisco area.  I'm totally new to the area and looking for information.

1. What areas to target for an initial search for residence (renting)?  I'll need to juggle my commute (office is located near Howard &  1st), housing expenses and living environment, including two kids in public elementary/middle schools.
2. Do people typically use leasing agents in SF?  If so, any recommendations would be appreciated.
3. In the next year or so, I'll probably look to purchase a residence.  Any recommendations for agents in this capacity are also very much appreciated.

Super excited to start something new, and thanks in advance!