What level math should I take if I want to be able to take the AP clac and stats test and get a 4 or 5 (on the side)
IB Math HL should include AP calculus BC material.
IB Math SL includes some calculus; some students also take AP calculus AB (possibly with some additional study).
Note also that many US universities do give advanced placement for sufficiently high scores on IB Math HL, though the placement may not necessarily be the same as for AP calculus BC. Advanced placement for IB Math SL in the US seems to be rare or non-existent.