Hey Andy,
Depending on the authority of the page and the general domain authority you should determine the ability of a page to rank for a specific keyword / keyword combination.
Answer question 1:
Don’t try to target too many main keywords for a single page. In most cases it’s more efficient to target your main keyword in combination with a relevant key phrase.
Answer question 2:
You should use your brand name inside your title tag:
– When you’ve got a well known brand name you should mention it.
– If your brand name contains relevant keywords.
– You have the available space / characters left to mention your brand name.
You shouldn’t use your brand name inside the HTML title tag:
]]>– When your title length will be longer than +/- 70 characters.