MOSCOW, Dec 24 (Reuters) - Russia's top crude producerRosneft said on Monday it has agreed terms forlong-term crude supply contracts with international tradersGlencore and Vitol as it seeks funds to finance its $55billion takeover of TNK-BP. Under the heads of terms, Rosneft plans to sign contractswith prepayment for a duration of 5 years to supply up to 67million tonnes of crude in total. Supplies are expected tocommence in 2013. Sources close to Rosneft and potential lenders told Reutersthat Rosneft and its traditional oil buyers were in talks onlong-term deals to raise up to $10 billion, using future oilexports as collateral, to facilitate the TNK-BP acquisition.