Noone really answered your question so i will,
1.as far as prices... they very alot but around where i live its like 20 euros for an 2 gram of dank or 20 euros for 1 gram of hash... hash is definatly more economic.
2. Uh... depends on method but i usually use a gram or 2 of some dank for a nice smoking sesh... i dont currently have a scale but if its good hash all it takes is a ball the size of a match head.. (0.3 grams approx)
3.how to smoke it.... well i assume u know how to smoke weed so for hash i would say there is 3 main.. ways ther is a100000 ways but a) is crumble sum ontop of a bowl and hit it.... it like amplifies the weed so middies weed will feel like super dank.
mix it in with tobacco or weed in a joint.. c) (My favorite way and i think the most efficient) Heat up a knife... super super hot ( on ur stove, with a lighter it doesnt really matter) then put a ball of hash the size of amatch head on it. then heat the bottom of the knife for like 15-30 more seconds... remove the ball of hash put it on a flat surface... put a cup over it to capture the smoke... when the glass is really full just use a straw to take hits of the smoke. (there is alot of othr ways... those are just 3 primary ways i see ppl use)
4. Health affects..... ummmm i think the same as weed.. maybe a little better because the plant matter is removed hence no burnt plant matter tar in ur lungs..
5. hash is like a stoning high intense but super mellow couch lock kinda like SUPER DANK indica...
6. HASH IS NOT RESIN... OR PRESSED KIEF. THE PROCESS OF MAKING HASH SIMPLY REMOVES THE PLANT MATTER AND SOME UNNEEEDED CHEMICALS... ITS LIKE WEED WITHOUT THE STUFF THAT DOESNT GET U HIGH!