only qualified personnel may install or repair this product.

How would the previous sentence be correctly capitalized?
Answer: Only qualified personnel may install or repair this product.
large box, with up to about 15 smaller yuccaplants (about the size of those which have been cultivated in 3 liter rosepots) kr. 280,- (€ 38,00)

How would the previous sentence be correctly capitalized?
Answer: Large box, with up to about 15 smaller Yuccaplants (about the size of those which have been cultivated in 3 liter rosepots) kr. 280,- (€ 38,00)
(whether this is system0001, system0002 etc., depends on the amount of sql databases that have been created.

How would the previous sentence be correctly capitalized?
Answer: (Whether this is System0001, System0002 etc., depends on the amount of SQL databases that have been created.
„verein spunk“ is a non-profit association.

How would the previous sentence be correctly capitalized?
Answer: „Verein Spunk“ is a non-profit association.