Not much, id say 5 - 7k if your lucky, but also is it in good condition? If u get a new suv, i suggest getting one that'll last you a long time like honda, toyota, or nissan
Better get it repaired or you will take a bath on the value. Not Starting can be as simple as a bad wire, connection, or as serious as a blown engine which includes many maladies.
Depends on what is wrong with it. Anywhere from $600 to $3 or $4,000, and if you get it fixed it could sell for as much as $14,000 depending on its condition.