The totals on the tabs are important and useful, I think, because they indicate to the user whether there is something to be seen on the tab at all.
Whether you repeat the totals on the table header depends on the design system (e.g., Google Material Design) you work in: If it calls for separate table titles in cases like this, and it recommends the totals in the table header, the redundany does not hurt. But if the table is the only information on the tab, you can think about removing the redundant table title completely - it's not only the count which is redundant.
Placement of the buttons also depends on the design system: It might define a "table toolbar" where actions on the table (and its rows) are placed. Whether the far right position is a problem (in terms of discoverability as well as in terms of mouse mileage), depends a lot on the data in the table (we have no indication on the number and width of columns) and whether tables can shrink when their data is not as wide as the page. The other obvious place to put the create function is at the end of the table - either as a single left-aligned "Create" button or as an empty editable table row. Whether the top-right or the bottom-left (relative to the table) placement is good also depends on the users tasks: Do they need to enter many new items, or is the create function infrequently used?
As Michael already wrote, there are many alternatives, and you can refer to guidance from your users (actually ask them by testing a prototype!) and their goals as well as the design system you work with.