About your questions no.1 & 2, you can see the numbers of search result in header and the sorting button when you use the Primary Menu Search Bar. Custom search bar and widget search bar don’t have that options I think.
I’m using symbiostock Express theme too. Go to Symbiostock Express > Shop Settings, under ‘Shop Archive Page Settings’ there you can change the number on “How Many Products per Page”. Under ‘Shop Product Title Settings’ you can change the font and font size of product title. Hope it helps.