F2p pures range from range 2hers to melee or mage pures.
F2p range 2hs kinda be around 40att 60str and like 70 or lower range. This kind of pure is around 40-50 with 1 pray. Now with the new bh +1 worlds these types of pures are very cheap risking around 26k with food. You do keep the rune 2h in these worlds. Some use baxes tho with my pure when I had 40att and went f2p 2h works the best I found tho it depends on you'r pking style.
Mage pures are around 60mage and I think risk quite a bit tho am not 100% sure. I don't think these pures work well as I never tried them and most of them I see are either safes or runs in pvp so I wouldn't make one.
Melee pures would tend to be around 40att 70str and be level 50 or so these do work well if you have 1 pray to stay low cb however most of them get pray to early I think so it ruineds them at low lvls. You would be risking a rune scim and keep the 2hers. (only if you bring a 2h)