Well,
If I could ID the BB, then we'd have a better idea where to start. The top bike is a collection of parts. Thats a reynolds fork i believe (circa 80's) and its a track bike frame . It looks incredibly like a early 80's Panasonic track frame, thus the shimano components. Tapered crank is also within that time frame as well. Mavic rims on what kinda hubs? Look closely at the front and rear dropouts, mfgers name should be on them if theres not to much paint build up. Measure the diameter of the seat post that'll help narrow it down as well. If the fork is a Renolds it'll have it lightly stamped on the right tube or on the crown or both as well as the dropouts, but excessive paint build up can make it difficult to see. Lastly check for thread type on the head set and or BB. If its european it could have english or french italian thead types. Depends on age of the bike.
The 2nd bike is a quandry as well, (both have very common frame lugs) it has a combination of simplex (mainly peugeot) and stronglight conponents. Again see if you can ID the dropouts,
The brakes look like campy, but I can't tell from the picture. The rear hub is dated, looks to be a 5 speed freewheel. Its got touring gearing. If its a freewheel its ancient. The rear hanger is not a peugeot type, peugeot rear hangers never looked like that, maybe a simplex hanger as well, it to looks to be early 80's type. What kinda hubs does it have front and rear, if its peugeot, it'll have malliard or hellicomatic hubs. Malliard equals older, hellicomatic equals newer. Neither were very good.
Also, one last thing, wheel spacing. Older bikes had 100mm spacing up front and 110 in the rear. If either have 110mm spacing up front its a newer frame (mid 80's and on). The rear spacing can be difficult to determine due to the fact that people will shove a 120mm spaced hub in a 110mm spaced frame bending the rear wheel stays and then who knows what it really was unless you can ID the frame mfger and year of mfg. These types of bikes are like these types of motocycles, just 'eye of the beholder' stuff. One mans junk is another mans treasure.