Metal roof repair? And install new flashing?

Hi, I recently purchased a house in Serene Lakes, CA (near Tahoe... and we get a LOT of snow in the winter). It has a metal roof and there are two issues we'd like to address: The first issue is that the roof doesn't cover the fascia on the south side of the house. So I'd like to install something (maybe flashing?) to extend the roof to cover over the fascia. Here are some pics (I'm just going to attach a link to my google photos of the issues as it looks like I can only attach one pic at a time to these forums?) What do y'all recommend I do so I can cover the fascia? And do you think the fascia needs to be replaced? https://drive.google.com/open?id=0B8q8o_8vcfSIZVNGbFFqQmNnODg Oh, and I intend to rescrew the metal screws that are coming out... that you can see in these pics. Do you recommend replacing them with larger diameter screws or just re-screwing them back in? And if larger diameter screws, do you just go up one size? The second issues is that there used to be a leak. There is evidence of water damage in the upstairs bedroom and the garage ceiling directly below the "repair." It's where the roof comes together at a junction... and the repair looks quite shoddy and I'd like to get it fixed before the winter when there is constant snow for 5 months. Here are the pics of that. I'm trying to get a professional roofer out there to look at it, but just wanted to see if y'all thought this could be an easy repair, etc. Thanks!