Most people on ech0 already know how to do slayer. Equipment:
*Decent armor and weapon
*Food
Destination:
*First tele to legends guild. Talk to tureal, he will tele you to the slayer tower.
What to do:
*Kill crawling hands until level 20. Then basilisks till 35. Then jellies...and so on. Its slow but it helps you train your combat. Good luck and I hope this helps