Hei!

Les Cadeaux

J'ai magasiné [depends where you are, it will be understood or not. I'm from France, and we will say more "j'ai fait les magasins" or j'ai fait du shopping"] hier et j'ai acheté beaucoup ["un lot" is correct but it sounds a bit strange, more for some kind of television show where you can win prices, or if you buy some gifts which have something in common, like "un lot de bijoux" = some jewels. "Beaucoup" here would be "a lot"...in English, because a lot in English and French have not exactly the same meaning :)] de cadeaux. J'aime acheter des cadeaux. Mais je n'aime pas trop recevoir de cadeaux. Parce que généralement je n'aime pas les cadeaux que les gens ont achetés pour moi [lol, that's so true...XD Anyway, let's be serious. Here, you have one horrible French rule: with the auxiliar avoir, the object is not variable, always masculine and singular form, except if the object is before the verb. To be clear: here, people have been buying what? Gifts. And Gifts are before the verb "ont", so achetéS will have the plural form, because cadeaux is plural. If you say instead "les gens ont acheté des cadeaux", gifts are now after the auxiliar, and "acheté" do not change...XD]. Il est très rare pour moi de recevoir un cadeau qui me convient :) [Correct sentence, you can also say "c'est très rare pour moi]

Hope it will help because I'm not so clear...xD