pull the top piece back about half an inch...
as you may have noticed there is no external hammer.
with the top piece pulled back half an inch, push the piece in the back of the top piece in with some kinda poking device... and lift up on the top slide piece.. and it should come right apart.
25-50 USD
$25-$50. Sorry- very low quality firearms.
25-75 usd
25
50-165
If you don't have an owner's manual, find a gunsmith.
25-65 USD
Follow instructions in owner's manual
$50ish used if it works. They are not highly regarded.
Best thing to do is find a gunsmith
Best thing to do is find a gunsmith
25-200 usd