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Dictionary of American idioms

be up to something is the correct sentence.It means: To feel strong enough or knowledgeable enough to accomplish a certain task. Example, Are you up to preparing dinner for five hundred people? . A second meaning is: Tendency to do something mischievous.Example, I'm afraid George is up to one of his old tricks again. A third meaning is: doing something. Example: What are you up to right now? So, to answer your second question, it can mean, "what are your plans/what are you doing today", although it sounds more natural to use it when asking someone what he is doing right now.

If Mr Suresh was the person who collected the items, the sentence should be:

The below mentioned items have been collected by Mr Suresh.

If Mr Suresh was the person who was originally in possession of the items, the sentence should be:

The below mentioned items have been collected from Mr Suresh.

Note some other small changes.

• Added the definite article at the beginning of the sentence.
• Changed has been (singular) to have been (plural).
• Removed the full stop after "Mr" because my usage is English. American usage favours including the period as "Mr."