Is there a table somewhere that lists how much gold a 5th level character would start with? or how many magic items of what kind of rarity they might have?  I thought the DMG would have something but im not seeing anything in there. 

There is, in fact, an official and standard table for just that kind of thing. From the DMG:

Starting at Higher Level

Character Level	Low Magic Campaign	Standard Campaign	High Magic Campaign
1st–4th	Normal starting equipment	Normal starting equipment	Normal starting equipment
5th–10th	500 gp plus 1d10 × 25 gp, normal starting equipment	500 gp plus 1d10 × 25 gp, normal starting equipment	500 gp plus 1d10 × 25 gp, one uncommon magic item, normal starting equipment
11th–16th	5,000 gp plus 1d10 × 250 gp, one uncommon magic item, normal starting equipment	5,000 gp plus 1d10 × 250 gp, two uncommon magic items, normal starting equipment	5,000 gp plus 1d10 × 250 gp, three uncommon magic items, one rare item, normal starting equipment
17th–20th	20,000 gp plus 1d10 × 250 gp, two uncommon magic items, normal starting equipment	20,000 gp plus 1d10 × 250 gp, two uncommon magic items, one rare item, normal starting equipment	20,000 gp plus 1d10 × 250 gp, three uncommon magic items, two rare items, one very rare item, normal starting equipment

Of course, this kind of thing is ultimately determined by the DM, but this is the "standard" you're looking for.

Thank you so much!