1 ltr of milk and 4 friuts a day is too much sugar?

Depends on the fruits you are eating.

Berries, avocados, lemons/limes for example don't have hardly any sugar.
Apples, oranges, pears, peaches have lots of sugar.

The milk sugar does add up, but it's still better than fruit juice or soda. And it has protein, which is good.

Maybe cut down on milk a little bit, and definitely eat fruits that don't have a lot of sugar in them to be safe.

It's too much. Just drink half litre of toned milk, and 2 fruits a day.

The milk is unnecessary.

It is tough to OD on sugar from fruit.

Unless it's canned with sugar added.