how should i prepare for company FMS (i.e. finance and manpower solutions) it is coming for placements on 12 march.

Research the company website, wikiJobs, the financial times news, company news & events in general. Get on linkedIn, follow their company, view their updates and get connected to the contacts that visit your school/uni. Make sure you take your CV (with all relevant experience) and/or business cards - which you can get printed from VistaPrint of similar.

Read everything up on them as you can, their recruitment process and previous experiences may also be online in addition to knowing your stuff in regard to the job you want.