STR pures aren't for everyone.They are only for people who have a decent amount of money. They however the cheapest type of pures. Try not to make a generic name like I PK YOU or STR Pure N00b.
Ok, lets start this, first you will have to buy all the scimitars types (except black),cape and gloves and some food.(Its best to fish your own food till your ready to eat lobsters, then you buy). Also get some green dragonhide chaps, vambraces and noob iron armor.
Once you have all of that transfer it to your pure, the easiest way is to go to a German server and drop trade somewhere off place. As a lvl 3 noob you can't do much except equipping your stuff and start slashing at those chickens. Get Attack to 5 and STR to 5. Equip your steel scimitar and move on to the cows.Train there till 20 Attack and STR.
Here comes the boring part. Go to the Monastery where the monks are. It is located a little west and up north of Barbarian village.No need to bring food as these monks heal, just right click and talk to them. Now you must spend days slashing at these monks till lvl 40 Attack and 40 STR. It will pass very slow and its good to take breaks now and then. Once your finally done, go buy some arrows and a bow.
The reason for this is to get to 40 range so you can wear green dragonhide armor which will protect against mages. Train on chickens till lvl 10 range. Then go over to cows and shoot through the fence to not get hurt, be sure to collect them before some noob comes and steals them. Train here till 30 range. From 30-40 range go to barbarian village bar and shoot across the table to receive no damage.
Once you are 40 range go to world one in the range shop and buy green dragonhide chaps and vampraces at a price I don't know (Zybez.net is a good place to check prices). Once you finally have your armor go buy a brass key; go to north east of barbarian village and open the door and go downstairs. Here you will meet the Hill-Giants which can provide money and exp for your pure. Take plenty of food as they will hit hard on you.Raise your STR lvl to what combat lvl you want. People usually raise to 60 STR.
After all this hard work, you can finally PK. your equipment is iron plate, iron legs, gloves, boots, a cape, green dragonhide chaps, vampraces and a STR amulet. In your inventory should be a STR potion and lobbies.
PKing is risky, don't go there when short on money, be sure to be willing to lose your stuff. You won't kill everyone but you sure will a STRong force in the wilderness.
Happy PKing and hearing noobs whine...