Yeah, I don't think this is what Shadow was asking about clarkstill, but I'm very confused too. Shadow for what you mean the use of bimolecular and unimolecular is not correct, you should say intermolecular and intramolecular respectively - this is what I understand you mean for the Sn's. For eliminations I have no idea what you mean - of course E1 = unimolecular elimination, E2 = bimolecular elimination and I guess you're asking if you can eliminate the halide and form and enol --> ketone/aldehyde?
Intramolecular Sn1/Sn2/spectrum between the two mechanisms depending on the exact structure and hence stabilization of potential carbocation-like intermediate will be by far the dominating pathway, intramolecular reactions are simply much faster than intermolecular for obvious reasons. However, you might get a dimerization/polimerization products from a different pathway - when you form an oxirane and still have the halohydrin species present, you can envisage attack of the OH of halohydrin on the oxirane, leading to its opening, and so on. Will depend on exact conditions of how you do this.
Eliminations I would see as slow in this case, if you do them in basic pH you would be forming a quite high energy enolate, this will probably make the TS energetically high and reaction slow. But maybe, especially at higher temperatures.