just wondering how the word [kana]takusan[/kana] is meant to be used, for example can you use it to directly modify a word in the same way you use [kana]keiyoushi[/kana] e.g [kana] oishiitabemono[/kana] thus could you use [kana]takusan[/kana] like e.g [kana]takusantabemonogaarimasu[/kana] or does it have it have to be used like [kana] ...tabemonogatakusan arimasu[/kana] if any one could help it would be really be appreciated, thanks.

Like most numbers/quantity words you can use it adjectivally (with [kana]no[/kana]) or adverbially.

As an adjective:
たくさんの絵画がその店にかかっている。 'Many paintings hang in the shop.'
ケンは君よりたくさんの本を持っている。 'Ken has more books than you.'

As an adverb:
窓から高い山がたくさん見えるでしょう。 'You'll see a lot of high mountain through the window.'
彼女はたくさんお金を持っている。 'She has a lot of money.'

These examples and more from...
http://www.csse.monash.edu.au/~jwb/cgi-b...4%BB%B3_1_